5 weeks preg and bled red blood 4days ago,only lasted an hour no pain. done preg test today and got positive 3+ is my baby ok?

Probably: 1/2 of all pregnancies have some bleeding in the first trimester. Of those 1/2 have miscarriages which are usually due to something the matter with the baby. The other 1/2 go on and have perfectly normal babies and we never know what caused the bleeding. Since you stopped bleeding and are having no more problems, your baby is probably just fine. Hope this makes you feel better.