Braxton hicks?

Im still quit confused on what they are but my stomach/lower stomach/ or upper stomach it gets really hard when my baby girl kicks it also hurts and is a sharp pain and i have them about every 5minutes they dont hurt what so ever but ive been having a lot for the last couple of 32w2d and im a ftm and am really a worry wart! Im not sure if i should just call or leave it alone to see if everything gets better. I change positions and drink lots of water.