Worried

Im 8 weeks and 6 days. I've had two ultrasounds so far one at 5 weeks and one at  7 1/2 and everything has looked great. I mentioned to the doctor that I had a gush of blood at 6 weeks followed by light spotting. He didn't seem concerned. Two days ago when I woke up I went to the bathroom and when I wiped it was slightly pink. Then when I woke yesterday and peed it looked like a little flake of tissue on the toilet paper. This morning everything has been normal. I'm worried about miscarriage... I can't wait to make it out of this first trimester