So any down days 🙁

I'm a first time mum. I have an almost 5 month old son, and I absolutely love him more than anything in this world! I've never been a patient person, so motherhood has made me better at that. The past few weeks have been hard, my son cries more, his feeds are all over the place, I've had to tell him 'no' a lot because he tries to wriggle out of his chair and if he does he'll hit a hard floor (he's only in the chair whilst I prepare a bottle). I feel like crying most days. When my OH gets home he doesn't exactly relieve me much from my 'duties'. He plays on his phone more than with little man sometimes. I know he works for 8 hrs a day but it's totally different to looking after a baby all day. I'm on maternity leave until January then I'll be going back full-time (I don't want to go back full-time but can't afford not to). Does anyone else have days where they just want to cry? 😢😢