Overwhelming emotions

So I just had my 3rd baby 4 days ago. I had him via emergency C-section which was the first for me. I have never dealt with baby blues or postpartum depression or anything with my past two pregnancies. Currently I have been having these weird emotional episodes where I just start feeling really sad and almost out of body. I don’t feel like myself and just feel really uncomfortable. (Almost like a home sick feeling). I love my baby boy and don’t have any ill thoughts or feelings towards him but sometimes I just want to cry for no reason and I can’t make sense of it. Also feeling overly irritated at the smallest things with my older two kids and fine myself yelling at them more.