Period-like pain

BonBon
Hi ladies, I'm exactly 5 weeks today. I got a BFP at 4 weeks :-) It still feels like I'm about to get my period & I keep checking for blood but there hasn't been any. It's like this cramping/vaginal pain, very similar to period, but it hasn't gone away for almost the past 2 weeks. It's not one sided, and there had been no blood/spotting. Anyone have the same issue or know what's going on?