Hey lou I posted really early on when you first found out about your twunt of an ex. Congratulations on your DS - Adam is a beautiful name!
I have been on my own since finding out I was pregnant, and my Ds is 15 months now. Honestly, the first 4 months I found exhausting. I cried loads and really, don't remember much to be honest. Then things clicked a bit more and I sort of came up for air. You are doing a bloody amazing job, it is HARD, and look at what you are achieving!
I also avoided mum groups, I felt like I was being judged, but also sometimes the jealousy of their happy family set ups just was too painful for me. However, when I did bite that bullet, I realised that actually most of them weren't living this utopian family life that I had built up in my head, and that it was worth it for the support a million times over. I found the groups were I interacted with my child easier than the sit about and chat randomly ones though - so baby singing and swimming were my faves, as the conversation was sort of directed a bit if you see what I mean.
Are you co-sleeping? It made my life a gazillion times easier. Trying to think practically what else helped.... will have a think and get back to you :)
Lastly (sorry for the essay) my ds dad didn't see ds till he was 4 months old. He now visits every 4-6 weeks, but has recently complained that it is too much hard work so has asked if he can he reduce this. I struggle with knowing what's best to be honest, so decided quite early on to try my damndest not to lose sleep over someone else's decisions. I cannot control how he acts, so I try to just accept what he says and go with the flow. I was beating myself up about how my son was losing out, and how could his father just not care like that, but to be honest, it changes nothing and all I was doing was upsetting myself. This is obviously easier said than done!
Your DS will be loved by so many, let others share in how bloody wonderful he is - and seriously, be kind to yourself. It is so hard at this stage, and you are doing a fab job.
Sorry for the essay!