Bleeding at 8 weeks

Today makes 8 weeks for me on my first pregnancy. I’m 30 years old but my husband and I had only been TTC for 6 months when I had a positive pregnancy test. We were absolutely thrilled. I have my first ultrasound scheduled for tomorrow m orning and have been super excited about it... until now... I started spotting Sunday evening. It was dark brown at first and I wasn’t really concerned bc of the color and the lightness of it.. also bc I wasn’t cramping.. but yesterday the spotting became more and more red with specks of bloody tissue & accompanied by cramps. Today the bleeding and cramps along with the tissue are continuing... so now I’m freaked out like I would have miscarried. I don’t want to call the doc. I will wait until tomorrow morning, but was hoping any of u had similar experiences and a success to follow.. I’m really just hoping for some encouragement.. thanks :)