Period cramps but BFP


Hi ladies! In my last post I shared some pics of a vvfl, I was excited, but after half an hour or so they disappeared. Two days later, today in the evening I got like testing again and it was BFP, tested 10 mins later because I couldn’t believe it and it was also a faint line but was there!! The problem is that I’m getting period cramps for the last 3 or 4 days, thinking my period is about to come, but it didn’t, I’m one date late today, still with cramps and the BFP. Is this normal?? I don’t know what to think and don’t want to get too excited!! What do you think? Is it normal?