Menstrual cramps, BH, nausea, possible mucus plug, are these early signs of labor?

I’m 36 + 3 and the past 3 days I’ve been getting menstrual cramps throughout the day and nausea. I have Braxton Hicks every day but yesterday I had regular contractions for about 2 hours about every 10 minutes and then they went away (don’t know if that’s normal). I’ve been having a lot of discharge but tonight I lost a small bit of jelly like discharge. It was a long string of it about 1-2 inches long. Could this be early labor or am I overthinking things? Don’t know whether to call the midwife or just wait until my next appointment on Friday.