Bleeding!

I am 6 weeks today and had sex this morning and then noticed bleeding, which has scared the crap out of me!  It's not heavy and it's pink, not red.  I haven't had any spotting the whole time leading up to this, even with intercourse. I hate that I can't get in to see the health care provider until the 6th and I doubt they're going to do an ultrasound.  I'm worried.  Any one else experience this?