Positive, now negative... ugh !?

I'm new to this. But me and my S/O have been trying for baby #2 since April. Had a chemical pregnancy in September. My periods have always been a little off, anywhere between 3-5 days off. According to last months cycle I should've started around the 19th.. I'm 10 days late. I took a test a couple days ago and it was a very faint positive. But the positive line disappeared after 8 minutes. I took a digital and it said negative.. then I took another 2 days ago and it was a super super faint positive, barely even there.. but every other test says negative .. 
Total: 2 faint positives. 6 negatives.... 
^First one I took. Then had a negative the next day & a digital negative. 
^one I took a couple days later. But I've had negatives since...