Help?!

Megan • Married💎Olivia 4/1/17• Baby #2 due in April•metformin.🌻
Alright girls I have a serious question!? I had a miscarriage on 11/20 at 5w6d, so 10 days ago, I had unprotected sex 11/26,11/28. When I was pregnant I had a feeling that I never had before.. It was a low key burning but not where I pee like on the inside itself.. It was like an icy hot feeling. Since my miscarrage I haven't felt that but today all day today I've been feeling that.. What could this be?!