Any Suggestions??

I wanted to see what you ladies think about this situation before I called my doctor.

This morning I went to the bathroom and I noticed I saw a tad bit of my mucus plug, as I assume it is.. I didn't think much about it, so I got ready and went to work. Two hours into my shift I began to feel pressure in my pelvic and had tiny cramps here and there. A coworker suggested I go home and call my doctor and another said it wasn't anything that it was probably the Braxton hicks. So I went with BHs. 30 minutes later I began feeling heavier cramps and I was getting suuuuuper hot so my manager sent me home to rest.

Should I call my doctor (or hospital since its Saturday) and notify them what is going on? Or should I wait until it gets heavier and more serious? I'm only 30 wks and 5 days. My due date isnt until June 17th.