Postpartum depression?

CM
I was wondering if I am suffering from depression. I have a 4 week old baby girl..
It's been rough 4 weeks. She has had weight gain issues, so I had to breastfeed and supplement from day1. Then we got her tongue and lip tie removed and even though she nurses better she howls and screams at my boobs and refuses to nurse few times during the day. Feeding usually takes 1.5 hrs because I try and nurse for a long time and then get bottle and feed her and then try and put her to sleep.. 
I feel disconnected from my past life and everything that's happening now.. I keep thinking of the fact that she will wake up when she is sleeping and keep looking at the clock thinking when will she sleep when she is awake.. I don't interact with her, I feel ill equipped to take care of her, I think of future and I can't function properly.. I feel like this is never ending.. I feel very very anxious when my husband goes to work even though I have my folks at home to help..