Hi, I noticed a small (1/4 inch) tender lump on my groin as my body was starting to ovulate again, the first time post partum. I had a period, then, I thought it was going away, at least getting smaller. I am having my period again right now, and I noticed that it is a lot bigger (1/2 inch) and painful again. Could this be associated with hormonal influctuations? Should I be concerned about lymphoma?