I'm sure you have, but you might want to check with your doctor again, since it sounds like you might have postpartum depression. If the Paxil isn't working, you might want to try a different prescription (if you can - depending on what's considered safe & if you're breastfeeding), in addition to the support groups. Hopefully, your doctor can also point you to support groups or a good therapist?
I also just wanted to say that I applaud you for actively seeking help. You're still strong & independent, but you've been through a rough patch that would throw anyone for a loop. When you're a mom, you need all the support you can get. Sometimes, you need to demand it - and it's great that you are!
Good luck to you. I hope that you find happiness again very soon.