Girls ??who is how many times a day the belly hardens, most likely tra…

Girls ??who is how many times a day the belly hardens, most likely training how many times? I have a clear with every day more and more hardening, pinches in the stomach and ribs and head straight low lying, today about 5 times andkal,, with each day harder and harder, what do you think ? To the doctor only in March, discharge normal so I think that the condition within the norm, first pregnancy second trimester so calmly passed and now don't know how it should be ?