5 days bleeding 5-6 weeks pregnant

Warning TMI: Here is my situation. 5 days ago I noticed pinkish blood when I wiped. I put on a pad and found some spotting. I called the obgyn on call and she told me not to worry since i am not cramping and it is not heavy red blood. Monday it continued and there was more showing up on the pad. I called the obgyn and demanded to come in. I went in and tested positive for a UTI so I got antibiotics for that. She did a pelvic exam and saw a little bit of blood and saw that my cervix was closed. She also did a vaginal ultrasound and did not see any bleeding. When I went in I thought i was 6 weeks 2 days but according to the ultrasound all we could see was the yolk sac and fetal pole. She said I looked more like 5 weeks. There were no pockets of blood in the uterus. Since that visit I continue to bleed pinkish, reddish and sometimes a little brown. I  have called again because sometimes like today I get a panty liner full of pink (pictured below). They said there is still nothing they can tell and not to be concerned until I fill a pad with blood or have bad cramps. I have a follow up in a week and a half. I am going crazy. I still feel tired, have nausea, and tender breasts. My pregnancy tests continue to have a very strong line. But I feel like with every day I bleed I loose hope. I am on day 5! Anyone else experience this?