Help Me.. Please

I’m 4 weeks and 4 days. I’ve had no spotting, mild cramping here and there. Really no symptoms.. I’m at work, and felt a little gush, when I went to the bathroom, my underwear had some very light brown discharge. When I went to the bathroom, there was nothing noticeable when I wiped. I had a Pap smear done on Tuesday, and no recent intercourse. When I google, it says it could be the embryo burrowing into the uterus. Should I be worried? I don’t have an ultrasound until the end of November and don’t see my OB again until December. I really didn’t want to post this, but of course now I’m over thinking. 😔 This is our first, just found out last week.

Thanks ladies!