Hi wise ladies of the bee!

I'm 35wk 5d, and I'm so paranoid (FTM obvsies!)
I had menstrual like cramping this morning from 4am-7am (7-10 min apart, 30-45 sec, but they went away) and then this evening I ?think? I lost my mucous plug, and have all this brown spotting.

Do I worry about this? Is this just normal body prep? I don't want to be one of those crazy ladies who goes to L&D for nothing! I don't have any cramping/contractions right now.

Does this mean anything?

Thank you in advance!