braxton hicks or labor pains?

J
For the last 3 days I've had really bad pains in my pelvis and contractions. I'm due 16th of may and this is my second Bub. 
I'm terrified of calling my doctor cause I went into labor with my first at 32 weeks and was put on bed rest until she came at 39 weeks. 
The contractions aren't regular but I seem to have more then 10 in an hour at times... 
is this normal? I've got a doctor appt/check up on Monday.