I felt the same way. But mine was way too frequent for a braxton hicks and it was not painful at all just tightening but too often like every few mins. I buat bodoh aje until my waterbag leaked at 35w3d. Only at the hospital did I know I was having a constant contractions but I was not dilating. Felt weird cos it's not my 1st pregnancy and this was something I did not expect as I know how braxton hicks and the real contractions feels. If in doubt, call the hospital and let them know. Then heed their advice.
U should text your gynae and ask. If worried go straight to check!