Bloody hell, Rufus, it's a bit shit that your DH is so uncompromising. He won't AI; he won't discuss masturbation; he forgets to take his supps and whinges when he does; he takes hair loss medication knowing that it is affecting his libido. So, he is prepared to be proactive about his thatch but not about making a baby. I'm sure he is lovely in lots of other ways but I personally think this is a hugely selfish set of behaviours on his part.
I understand the somewhat degrading aspect of fertile-window shagging. It is boring, baggage-laden, pressure-filled shit. No-one understands unless they have been TTC for over a year or, as in your case, you are having to get jiggy with it over several weeks in the month. My sympathies. However, this overarching negativity the two of you have isn't healthy. You have done brilliantly with the needs-must sex and your DH is understandably knackered. How do you relax as a couple? Do you have joint or separate hobbies, or none at all?
The tricky thing about TTC is that it shines a torch onto the underbelly of our relationships. It may be that you have never really bothered about your low sex drives before now (and if both parties can't be arsed shagging but still love each other then it's not unhealthy, right?) but making a baby has thrown up some fairly serious obstacles in the bedroom. How many more months is your DH going to 'put up' with this pressure? I hope for your sake the GP gets her finger out, considering your fella refuses point blank to wank in a cup and is caterwauling about having to have sex when he comes home from work (what does he do for a living? Coal miner?)
Your self-image is low and that is probably directly linked to your wacko hormones. Listen: the seventh is just around the corner. Do not take no for an answer when you demand help for the PCOS. Clomid will sort you out. Four cycles, by-the-way, is a very short time to be TTC. My advice is to do what it takes to enjoy each other aside from TTC. You need to feel attractive again. The answer? Why, make-up, of course! Cover your zits, wash your hair and go out and get pissed. Go dancing. Tell your husband to take the fucking supps or you'll go Rambo on his ass.
P.s..I didn't know there was medication for baldness.