emotional and anxious

So I'm 4 days pp and I'm really emotional and anxious my baby is really fussy sometimes he's breastfed  it sometimes he doesn't latch on and he starts crying I'm just a bit emotional and I can't help but cry sometimes plus I'm so anxious and scared for some reason. My fiancé had to go back to work yesterday the day we got home and I'm just a mess I have help here and stuff but I just want him here to help me. Is this normal for me to be so emotional?