Bleeding at 6 weeks, no cramping


Has anyone ever experienced bleeding at 6 weeks? I’ve been a nervous wreck. I went to the hospital at 5weeks 4days, with a little bit of bright red blood, they did an ultrasound & ran some tests, they assured me everything was fine, the bleeding went away. Yesterday i began having some brown blood come out so i went to my dr, she took blood to check my hormone levels & told me to come back Tuesday for an ultrasound because they can’t detect a heartbeat before 6 weeks. I just made 6 weeks today, it’s still brown blood & still no cramps. But i can’t help to feel a little scared & nervous. This is my 4th pregnancy & this has never happened to me before.