I had an implant and I keep bleeding. Should I go to the hospital?

Slight bleeding for about a week is nothing to worry about.
Even if a black clot smaller than a tooth forms at the surgical site, as long as blood does not keep pooling in your mouth and the clot does not keep growing, it is fine to wait and observe.
If the black clot keeps growing and blood continues to pool in your mouth, you should visit the dentist for hemostasis.