Irregular Period

So last month (October) I didn't get my period untill November 6th. So I had a regualr flow and everything was normal so I didn't think anything of it just thought it was backed up because I had been stressing. I finished my period the 12th and a week later (Saturday) I got my period again. I don't know if I'm jst overthinking this but i'm a little worried about me getting my period twice this month with only a week apart. Has this ever happen to anyone else?