Background: I have never missed a period in my life. It’s always right on time.

Well, my cycle was 13 days late, and then randomly got what I think is a period, but (TMI) it’s more of a brown discharge/ period? But it’s lighter than my normal flow.

So I randomly just took a test, and this was the result. I have read mixed reviews on “faint lines”, but I also do not know the relation to my unusual cycle? Can someone tell me what might be going on?