Hi birdpumpkin, it sounds like you're trying to cope with a lot alongside your depression, anxiety, PTSD and have a lot adding to it. But do you think you could shift the focus from others to yourself a little more??
It is really considerate/caring of you to be thinking of meeting other peoples needs or not asking for as much support from them, but reality is you are understandably going through so much and there's only so much you can/should be taking on. No-one should fault you for needing a little more help/understanding after everything you've coped/are coping with.
Maybe your husband could help a little more (if only in small ways- even they can make a difference), or even talking to him a bit more about the way you're feeling???
Maybe your parents would understand if you weren't visiting so regularly, and you could still help in smaller ways. Even having an occasional phone call from you in replace of a visit might really mean something to them. Afterall sometimes knowing that someone is going out of their way (making a phone call) to say they care can really count as well.
And your son......is he old enough to have a few responsibilities in caring for the cats (even with your assistance for a while), you know occasionally feeding some of them?? For some children, they can really value a responsibility like that........I don't know, what do you think???
So more about yourself, hey??!! A lot more about yourself!!
But for therapy, I'm not sure if that can be accessed on a sliding scale according to your income......maybe........worth checking into???
But you're not alone!! Whatever you're feeling, thinking, going through.........we're here.........so anytime you want to talk..........

Alison