I pump at work in the day and I DL at night. I've been having a large lump on my right breast lately which my pump can't clear. only baby latching can clear it. I'm back at work today and pumping twice (once every 4 hours) and the lump is back. what should I do?

Have you tried massaging the lump while pumping milk. If the only way to properly drain the lump is DLing your baby and you can't do that at work, try a few methods like massaging and placing a warm towel over that area when pumping. Don't let it be there for too long or it could turn into mastitis.