Bleeding. :(

Colleen • 19 years old, momma to a little boy Dakota & a little girl Kianna 💙❤
So I went to the hospital last night because I was bleeding but it had stopped and major pains had started  (before someone complain's about how I should of been there as aoon as the bleeding started, I have already been told I'd be one to get little periods during pregnancy) but I went as soon as the pains started, they told me it's best if me and my boyfriend don't have sex because my placenta might be too close to my uterus, ao my boyfriend could be hitting the baby and he said eventually I could start bleeding into my placenta and cause a miscarriage, has anyone else had this?  The doctor said it's best not to have sex until I talk to my family doctor, just wondering if I should be worried :/