Advice please

Hi parents! I am 6 months postpartum and I recently found out that my husband has been having an affair( with several women) since the time when I was pregnant. This has really shattered me I just cannot move on past it. We have talked about it and he has apologised. However, I can't seen to forget about it. I don't trust him anymore. I have been spying on his phone now almost a week. I haven't found d anything suspicious but I can't get this nagging feeling off. I feel like I neglected my daughter since the time when I found out. I am just so torn. I Actually wanted to leave but am afraid of where to begin from.

What would you advise me to do if you were in my shoes.