My period is always 5 days long with spotting on the 6th day. So the fact that I haven't needed a tampon or pad is worrying me.
I was using tampons because I thought the flow would get heavier like normal, but... *TMI WARNING* there was just a small amount of blood on one side of the tampon after 4 hours! This has been happening for 4 days now. Is this a very light period or spotting?
My temp dropped below coverline so I know that means there is NO POSSIBLE chance of pregnancy right?

What else would cause this?
AF was due 2/22 and I haven't taken a HPT since I was 11 dpo (2/18) and it was negative. My temps are still way low.