Just a heads up, this is a little tmi but a serious question that would be nice if someone could give me a little help with because I'm not the kind of person to run off to the doctor for every little thing.

So I just started my third week of birth control yesterday and I'm bleeding quite a bit even though I still have a week left until I get my period. It started a few days ago with spotting which then turned into just constant bleeding. It's not like fresh blood though, it's like dark or brownish. Idk if it's normal because I've never taken a contraceptive pill so I'm not too sure of the side effects or anything. I know spotting is normal but is this much blood normal? It's like I'm on my period with a really light flow. I know that if the pill is taken at different times or is skipped this can happen but I make sure to take it every day at exactly the same time and I haven't missed one at all.

Sorry if it is tmi, I'm just worried and wondering if it's a normal thing that happens to some women when they start taking bc.