A little worried..

Lacey • Mommy to an Angel 1.14.16; wife 9.24.16; rainbow baby 4.4.17 && Baby #3 Due 4.28.20
Ladies I need some help! 
So my son has a condition where it puts me at a higher risk to go into preterm labour. 
I've been having Braxton Hicks contractions for roughly 2 weeks but in the last 24-48 hours I get them around my belly button, then it moves down to my pelvic bone area (I think) and it's a little sore. I've been timing them here for there at their about 5 or so minutes apart. I've also had. Lot of yellowy mucus and some clear discharge so I'm not really sure what to do. We are seeing our specialist on Thursday but if this is me going into preterm labour, that hospital is an hour away (not counting the bad weather). Also the pain only lasts about 15 or so seconds and then goes away. 
Anyone else had something similar to this?