Maybe it’s all in my head.

So according to the app I am 6 days late and I’ve never missed a period before unless I was pregnant (I already have a 13yr old and a 3yr old) I took a test yesterday but before I took it the line in the circle area could be seen but not too dark. The test says negative but I really believe I am only because I’ve been sleeping a lot and I haven’t had any period symptoms. I’ve also been craving sweets a lot more and even dark sodas. I’ve also been having a little cramping on my right side but no spotting and when I wiped myself the day before I had clear/thick discharge. What do you all think?