Hi everyone New here. Just need some advice.

After many years of being in school, now 34 years old…my husband and I are ready to start our family. Our goal was to conceive on New Year’s Day. I was very excited, but on the 7th day I started spotting. I thought maybe it was implantation bleeding. But I’m going now on five days spotting. I’ve read that implantation spotting is only 48 hours. I did take a test today. 11 days after since having un protected sex and it was negative. Was it too early for me to test? Can implantation bleeding be more than 48 hours??