Bald Spot

Hi there. So I am FTM anf my baby is 3 1/2 months old. Since my husband is a slob and is just NOW the past two weeks helping clean (barely) I feel like o am constantly cleaning! So my baby girl is either on her back for her activity gym, bouncer, on her tummy for tummy time, feeding, i read some books, or on my shoulder carrying her around --trying to multi-task.

She is noticeably having a balf spot on the back of her head. Is this normal? Am I a bad mom?!?! Its just hard to clean with her in my arms and my husband sleeping till 3pm. He has insomnia. So can't fall asleep till 5am usually. I just feel bad I can't hold her all the time and she is in her bouncer a lot. .....I just don't know.....please give me advice. Thank you