Bleeding saw heartbeat

Isabel

Friday I wiped and I had some blood not much but it was alittle dark then yesterday and today I’m spotting but I had a ultrasound this morning and I saw my baby’s heartbeat but couldn’t find the baby that great I am 6 weeks and 2 days . Anyway I’m not sure what to think I’m not cramping but I’m not sure . Has this happened to anyone and baby is healthy and why did you bleed? I haven’t had intercourse either for a long while.