condom rash

I gave birthday to my beautiful little boy in may. Before having my son after sex my vagina would be perfectly fine with and without using protection. I have only recently been having sex with my partner as I was still healing. Last night after sex using a condom I felt itchy. I always bath after sex btw. This evening I have been very itchy and noticed I was very red and sore  and have some small sized lumps. 
I was just wondering if I have had a reaction.
Sorry if this is too much info just need some advice.