Pp question.. Help!?...?

I had my baby 5 weeks ago vaginally, when she was 2weeks I was breast feeding her amd started getting a really bad pain, like labor contractions I could bearly breathe it started in my abdomen and upper back then went lower, I had it for like 30-40 min straight then stoped for like 1hr and again then didnt come back.. And today I kinda got them again but went by fast, do you have any idea what it was or did it ever happen to you?? Ooh I did have an epidural the day I had my bby I dnt know if that matters.