Possibly implantation ?

Hey, so me and my SO baby danced on February 4th and I had some really sore boobs, was throwing up and caught a cold almost two weeks after that so I decided to test (February 17th) , the test came out negative, so I put it behind me and didn’t worry about it anymore, but babe just won’t stop worrying and he thinks I am.. Lately I’ve been super moody, sore boobs, cravings THROUGH THE ROOF! and I can literally smell EVERYTHING and it all smells SOO strong 🤢, I urinate every 30 minutes LITERALLY, and I’ve been going to bed a lot earlier than usual.. Well I made an appointment to see my OB the upcoming Monday because I haven’t had a period in a year and I’m curious about being pregnant.. Well Monday night I got home and showered and I noticed so brown looking blood in my underwear , then I wiped and it was pink , got in the shower and it was still coming on to the towel.. It has been going on all week and its only there when I wipe, not even enough to fill up a pad.. Did I test too early and could this be implantation or is my period coming back on?