I woke yesterday morning with dark red/brown - doesn't look like af

I woke yesterday morning with dark red/brown does't look like af and i was up at 8 saw this and then i went back to sleep up at 11:45 still felt totally drained and this stuff is not bright red like a perod should be and i was in bed again by 12:45 slept til 3 and i have been feeling really really tired and have had a headache all day and this stuff is like when you finish af been like that all day and not getting any heavier or redder and no cramps either what could this mean i am thinking of testing with a poundland test and see if there's anything but i know for sure this doesn't look like how my past periods have been like

First of all when I usually start off ever since I first started it's been light heavy light this morning woke me up (I had to use nearly all toilet roll to wipe) and now for Thursday old blood and that's about it and stomach ache (little one) and stopped yesterday it was like cm with dark tinge to it thought nothing of it

My af is usually light heavy then light never heavy straight away and I don't have any cramps not even af cramps also Tuesday I had a positive test

How do i upload pics please thanks