Need mommies advice

I’m a first time mom. I think I might be having BH all this week. Started Monday maybe 4 hours apart for only like 2-3mins by each day passing the BH are getting closer. Today they are every hour. Really bad period cramps. Back aches hip aches. A lot of pelvic pressure like feeling of being pushed down. I passed big chucks of clear long mucus twice this week since the BH started. I have an appointment tomorrow but now I’m wondering if I should just go to the hospital. I just turned 28weeks today. Has anyone experienced this? Could this be a sign of preterm labor?