I feel like I'm going crazy...

Kirsten • Pisces. Dreamer. Free Spirit.
I'll be 4 months post partum next Friday. In the beginning I felt sad and cried quite a bit, I chalked it up to being baby blues and also the fact that SO and I were having a hard time. Which was new because pregnancy was amazing & went so smoothly! As time went on I became easily irritated, and I rarely ask for help because I feel I should be able to do it all on my own. 2.5 months post partum SO and I seperated, meaning baby girl and I went to live with my parents. I became even more easily irritated, I lack patience, I cry, I say things I don't mean, I can't even feel anything emotional...I just feel numb! Now I'm 4 months and SO and I are doing better but I'm doing so much worse. I've not talked to anyone in fear that maybe I'm not going through post partum depression or stress, and that I'm just a terrible mother. SO knows I feel all of these things but now I just want to cry, I feel overwhelmed, and anxious...so many feelings my head is spinning. 
I'm not sure what I'm looking for, maybe just advice?