I will start by saying I am by no means an expert and I've been flamed before for my opinions and comments on such matters.
I will also say I had no difficulty getting pregnant the first time I was on the pill and not trying to! The next 2 took less than 3 months each time. I appreciate that's difficult to hear but I think necessary before I say what I'm gonna say
I had 2 mc before dd and while I was also dx with endo the way I coped was research! I wanted to give myself the best chance of a successful pregnancy the next time.
What I learned and tried to put in practice as much as possible was:
Ditch the toxins - as you say you're already a non-smoker/drinker but there's also caffeine (I feel quite strongly we're not told clearly enough in Uk the detrimental effects of caffeine on ttc and pregnancy, plenty will disagree) and other food additives. This has changed significantly since I was looking into things so worth doing your own checking into which additives may impact fertility and try and avoid them. I also was supported by then husband after I said to him there was some evidence that dads drinking/smoking etc could be a factor. He's always been more a health nut type anyway into sport but he did like a drink of a weekend and so he cut that out and he also cut out the little caffeine he had (he's not a hot drink person but he liked coke sometimes)
Diet generally - I'm veggie anyway and generally a healthy eater then though I was also underweight which was also something I sought to address. Family trait that was tough to remedy then - now I have the opposite problem - also a family trait! I moved to a diet that was as far as possible close to "everything cooked from scratch" so as natural as possible. I also moved to full fat milk, cheese and yoghurt and more protein (mainly to try and gain weight but I believe also improved nutritional content)
Supplements - I started taking pregnancy promoting vitamins before actually being pregnant. Checked with dr who was fine with this - again more is known about this stuff now and the advice will have changed significantly
Reduced stress - easier said than done! I delegated more at work, stopped over committing myself elsewhere (was always a "busy bee" anxious type), started a water aerobics class which helped centre me, we went on walks when I felt anxiety rising.
Ok here's the really controversial one but dr at the time said it would certainly do no harm providing right precautions taken (some oils and techniques are not advised during pregnancy) - a friend was an aromatherapy massage therapist and she was also a physio so knew her stuff - and she gave me a weekly fertility promoting massage, at worst it helped with the relaxation side especially as we chatted over things too at best maybe it helped? Who knows. Dr said at the very least it would probably help with promoting a healthy circulation and reducing anxiety.
Also I remember around that time seeing dr Robert winston on this morning saying that many of the couples referred to him and other fertility drs are often done so prematurely, because the gp hasn't (often embarrassment and people not wanting to discuss such things) properly established whether the couple is actually having sex frequently! Apparently a very common "error" which is also apparently often compounded by couples trying to "focus" on the woman's "fertile period" and so having little or no sex at other times and to further complicate matters couples or women often miscalculate when their fertile period is and so slightly miss the optimum time.
Another thing I think it was him who mentioned (it was a long time ago) was - gravity! Make use of it! I used to basically pretty much do a shoulder stand straight after sex! 
I also looked up something from "friends" (stay with me) - Monica's dad in that awkward scene where he's caught chandler and Monica literally ttc he says it's important the woman orgasms. My curiosity was piqued I looked it up and damn if it isn't true! The experts don't necessarily totally agree on WHY they think this is the case but apparently so.
I've passed on these thoughts to others and as far as I'm aware it's usually (not always) helped except of course where there is subsequently discovered known barriers to fertility
I don't think anything I've said is actively harmful in any way but definitely double check and keep yourself right.
Wishing you so much luck with all this 