I would have appreciated some more information but I shall try to help you with as much information as possible with the provided information. There is a chance that the bleed you first experienced was in fact an implantation
bleed, but what you have experienced recently does raise concern.
I would urge you to report to a doctor at the earliest to check on a few things, eg. Your beta hCG
levles to check if you were pregnant. The abdominal cramping does also raise concern, but we cannot really say much with just the information provided which is why we need to investigate at the earliest. In the meantime, please abstain from all forms of sexual contact and report to a doctor immediately.
Hope this helps.