Pain!

So today was my boyfriends and my 6 months together and I'm normally on my period when we celebrate our time together so we can't "celebrate " in that way. This month my period was a little early so we decided too do the deed as I was only spotting. The condoms we had didn't seem to be lubed enough so we tried separate lube for the first time. As soon as he entered with lube I had a burning pain  inside and around my area ? We thought it could be because I have excema but some help would be really great!!!? Also when I came home my period started getting heavy should I worry