Returning to work

second time mom

My son is 11 weeks and I’m breastfeeding and I’m returning to work I find it kind of hard Because I don’t want to leave him has anyone have this problem how was pumping at work was it hard did you have time to eat and pump at the same time ?how much time will I need to pump at work if my break is just 15 mins one break and 30 mins lunch please advise