Cravingsunshine - I hear you!
I could have written the same post when my son was tiny. I still struggle - less so now he is a tiny toddler, but the days are long and hard sometimes.
I remember days of crying and wish, wish, wish I had got some help from my GP. I work in a profession allied to health and it didn't occur to me that I had PND. Looking back I think I did.
You feel selfish but you are not. Parenting little babies with little/no support from wider family is mind-numbingly difficult. I had (before baby) responsible, high pressured profession and it was, frankly, a piece of piss compared to parenting.
I work minimal hours freelance and although the hours and flexibility are unbeatable, the isolation is really tough sometimes isn't it? I think you nailed it on the head when you referred to the insignificant social interactions. I yearn for someone to just say "fancy a cup of tea?" at some point during the day or ask my view on something...anything. I miss the intellectual stimulation and the agility of thought I used to have. I feel like foggy brained numpty these days.
My lovely husband works long hours and he is just about perfect dad and husband when he is around so I have little to complain about...its just...well lonely really. I have had zero success with groups and as an older mum feel a bit out of place.
Things that have helped me are having something -anything - scheduled each day. Forget whether the babies appreciate it or gain from it. You do. It has been a life saver because the endless days feel less suffocating. If you drive, just get out of the house. Yes, its a pain in the arse. Yes, when you feel low its so hard to get yourself and babies going, but it all seems different when the radio is on and you are OUT of the house.
Also, create something for yourself. A course you can do from home, join a gym, again anything that provides you with something that is just yours.
I joined the unmentionable (netmums) and met some other mums on their "meet a mum" board that are local. There are far from bestest mates of mine, but it helps a bit.
Anyway, don't suffer alone. I did and now I feel like I was an idiot. Anytime you need to vent, find me. Unless you are in Yorkshire, it will have to be virtual.
It gets better - I swear to God, it gets better. I am very close to loving it now. Those are words I never thought I would say!
x