Period ?

I’m supposed to get my period in 10-13 days and today I when to the bathroom and there’s brown blood when I wipe/ this usally happens to me when I’m about to start my period. 😵‍💫 I’m so confused on what’s happening. I do have a really bad flu or covid. Idk if this changes anything. My period was late last month I was supposed to get it April 7 and it came April 14. Could it be just regulating this month ?