HELP!

Ok I’m not sure what’s going on could be stress I have been stressed here lately but I had a period Nov 10 - 15 and the app is pretty spot on when it comes to my periods well I didn’t realize that I had missed my period and did not start my next period until dec 28- Jan 2 it was a medium flow lasted 5 days but now I have been spotting brown for the past couple of days no cramps which is unusual but I’m not sure if it’s because I missed my cycle in nov and it’s all out whack. I just wanted to know some feed back if this has happened to anyone and it turned out to be nothing or if I could be possibly pregnant.