bleeding during first trimester (12 weeks)

Abbey
Okay guys, just a quick question to see who else has gone or is going through bleeding in early pregnancy. I am 12 weeks and I am bleeding (less than a period) but still scaring me. No cramps at all. I have gone to the ER and baby was completely fine moving around and strong heartbeat! So a few days went by and it hasn't stoped. It will lighten up at times but always comes back. Went to my dr office and baby is still doing great! I'm just so nervous and scared. Dr said baby is sitting low like right by my cervix which might be why. Idk either way it's scary and my husband is so worried about it too. 
Just wanted to see if anyone else has been through this or is going through this and what did you do? Did it ever stop? 
Thanks!!