Help TTC!!

so me and my fiancé already have a 2 year old son and we were planning on waiting till after our wedding night (April 6) to start trying for baby number 2! But for Valentine's Day we decided to take a chance and not use protection. We decided if i get pregnant great and if not we will continue to wait for our wedding night. Anyways! Vday was exactly 6 days before my expected period. What do y'all think the chances are?? My cycle is usually 31 days long.. I think chances are low but I'm just so hopeful😩😩