Help! FTM

Crystal
So I'm suppose to graduate May 27th but last Friday I woke up at 1:30 am in a puddle of vaginal discharge which continued for the next several days(I'm assuming my mucus plug?), and ive been having the feeling like I'm on my period an been contracting on and off (when it does they're 7 minutes apart last about a minute and continue for several hours but usually stop after a warm bath or shower)... Im scared to just up and go to the hospital because I'm sure everything would be fine by the time I get there so I'm waiting to go to my doctors apt wednesday, I'm due June 21st but I'm pretty sure they got my due date wrong by a week or two( the doctor put down my baby boy is measuring ahead as with me an my uterus measurement's)... Is this feeling happening to anyone else? Oh an when I'm sitting for awhile I feel like his head is being pushed in a pattern like rhythm against my downstairs....?