Fussy baby

I apologize in advance I am so scatter brained so I’ll probably jump from one thing to the next.

So my baby is 4 months old and she has always been such a happy baby and only got fussy if she needed a diaper change, sleep, or to eat. Well lately she hasn’t been very happy. It’s going on 2 weeks now. At first we thought ok she’s probably teething right?! Not a single tooth. She had her doctors appointment and got her second dose of vaccines. That made it so much worse for about 2 days AND her doctor said typically babies are fussy the day before and the day of them getting teeth.

Well she isn’t AS fussy now but still not very happy. I can get her to smile for a second and then she’s just back to being kind of glum. I’m just worried about her. I want my baby to be as happy as can be.

She also gets really fussy when I leave her with her dad so I can go to work. Like she won’t calm down no matter what he tries and she just screams and cries. I dont know if maybe she has separation anxiety when I leave because when I come home she’s better. But still even with me she isn’t very happy.

Has anyone ever experienced this with their babies? Any tips?

Also I will add that I am still breastfeeding when I can. She used to only spit up when I’d drink caffeine so I always watched what I drank. I started drinking caffeine again and she hasn’t been spitting up but maybe her tummy just hurts. I’m going to stop again so maybe that will help.🤷🏻‍♀️