I'm confused...

Me
Sooo I thought my period had started on time but it's still just that brownish slightly reddish color and Its been two days, usually the first day is a lot of blood for me. I was four days late last month and there's no way I'm pregnant because I haven't had sex in like 3 months so I'm confused and don't know what to do/think? Any one have an opinion? Also like I'm still getting my normal cramps and symptoms and mood swings lol