Help Implantation bleeding or Ovulation bleeding???

Koko
On February 21 I had a miscarriage due to having a very bad accident. On April 8 I had my very 1st cycle since the accident and it was normal lasting 5 days. On April 14th my husband and I had sex and have been sexually active. On April 22 I started spotting brown discharge, along with some cramping, headaches, and fatigue. I have been having brown spotting for 7 days now. My cycle isn't due until May 8th. Could this be implantation bleeding? Its not a flow and doesn't require a pad or tampon. I've been pregnant 3 times 2 resulting in miscarriage, and I've never experienced this before.