Sore Vagina

Alright I have no idea where to post this so thought this group would be fine.

So my husband and I are trying to conceive and my fertile windows are coming up so he and I baby danced today and never got to finish due to our son waking up.

After our son went back to sleep we tried to finish where we left off but I was extremely tender, my walls are very sore so we didnt get to finish.

My question is, is this normal and what can I do to make this better because I want to try and conceive this month.

Sorry for the TMI but needed to ask.

Thank you all in advance