Advice, please!

Okay, so my cycle comes like clockwork every month. If my period is due on a Friday, Friday morning and 1 or 2 am I’ll be cramping and then start. Well, last month I had a very light period. Which is odd for me because normally I have a light day, 2 HEAVY days and then end with a light day and it’s usually that nasty brown stuff. I didn’t really think much about it and figured I would just wait and see what happens with the next period before I question it. My husband and I are not “trying” but also not preventing. We had sex several times before and during my ovulation days according to Glow. I started feeling really off about a week before my period was due. I’ve been so tired, emotional (SO SO emotional), lower back pain out of nowhere and I’ve had cramping that’s different than any period cramps I’ve ever had. I would cramp to the point to where I would have to kind of hold my lower stomach until it would go away. I just kept thinking to myself- oh I must be starting early. So I would go check and nothing. About 3 days before my period was due, I had some light spotting. One night after work, I wiped after peeing and there was faint light light blood on the TP. I wiped again and there was nothing. I figured again that I must just be starting my period. My period was due on Friday 12/1. Again I’m like clockwork. I’ve had ZERO of my normal period symptoms. My boobs haven’t so much as even hurt. I took a test that Saturday morning since I was a day late, but it was negative. A few more days pass and still no symptoms other than the same ones I listed above that started a week prior and then also I would get nauseous at little things. Like the smell of coffee made me gag. I took another test at 4 days late and again, negative. So I told myself, okay I’m not pregnant. But where the heck is my period? So I tried to push it out of my mind and see if it’ll just start on it it’s own. Late in the evening on late day number 5, when I wiped when I peed- I had like a brown color on the TP. I thought weird. I wasn’t cramping at all or anything and I only have that color at the end of my periods. I put on a pad and figured it was starting. Woke up the next morning which was day 6 of being late- my pad is EMPTY. I wiped- still very little brown coming out on the TP. If I wiped again, it was gone. I put on a new pad and went to work. I went to the bathroom twice and when I wiped- still there but yet my pad was empty. Last night, I got home and I had a very very little bit of brown in my pad. Now normally on my period, I will go through like 7 pads a day and they’re FULL. I changed pads again and went to sleep. That brings me to today. Day 7. Late. When I wipe, it’s brown. & very little in my pad. I felt a little come out when I stood up this morning and when I checked the pad- it was the brown stuff. I took a pregnancy test with my FMU- it was negative. Has anyone had this happen before and what was the outcome? I just need to either test positive or get a period!! I hate not knowing! Sorry for the novel!