Implantation?

B

How long does implantation bleeding usually last? It’s been over a month since I’ve had my last period and I’ve been having spotting only. Usually this color but sometimes reddish and its been happening every other day for like a week. I can put a tampon in for like 5 hours and nothing is on it but I wipe occasionally and get this. Is it happening enough to be a period? Or what is going on?