Random symptoms.

Ok so I’m 7 days late, very unusual I’m almost always early. Boobs are sore and larger, slight but not drastic nausea, crazy exhaustion.

Then today I started what I thought was my period, it was much more than just spotting. Thing is it was mostly brown with only tinges of red, also not usual for my first period day. However now it’s almost completely stopped. Any thoughts on whether this is a normal period going about it’s business, possibly just old blood on its way out while I am maybe pregnant, or something else?