Spotting?!

Im Six weeks and four days now or I would like to believe. I started bleeding this past thursday night till friday morning then it completely stopped. Im a little scared because the blood was bright red and I noticed a clot in the toilet. I went to the dr on saturday and they told me there wasn't anything they could do due to it being a saturday and the obgyn was closed but most likely I should be fine because a miscarriage comes with extreme pain and I would have bled out like a period or possibly even longer. Has anyone experienced this? Just need a little hope till I get an ultrasound on monday.