Bleeding while pregnant

So I’m 7 weeks and 3 days and at 6 weeks I was bleeding for a day straight and went to hospital and everything was fine then the next day stopped bleeding and then two days later the bleeding happened again then stopped the next day and I went to dr and he said it’s fine but asked me to come back in two weeks now it’s dark brown and in the toilet there are lines were when I pee if came out. I’m not having really bad cramping just really light ones .Did this happen to anyone else and everything turned out fine. Really worried.