Assuming this is AF?

So my period was due on Monday the 21st but instead i started light pink spotting the day before on the 20th not really cramping or anything. On the 21st I think I woke up with like kinda thick red bleeding but it was when I took the tampon out and again no major cramps. Mind you my period is always really heavy in the beginning with severe cramps but this month My period hasn’t even filled half of a tampon and I haven’t really cramped I just took my prescription ibuprofen 800 a few times to avoid cramps but I seem to be fine without it surprisingly. Today I went about 5-6 hours with a tampon in and when I pulled it out the only thing on the very tip of it was light brown discharge looking and I’m on day 4 of period but it seems to be going away. Is this just af? I’ve had bright red bleeding not only the brown discharge but the bleeding only covers not even the full top of the tampon & its not a flow of it. I also have not had any clots. Period is usually 6 days long