Faint OPT line - help!

Not sure what to make of this... Am I about to ovulate?
​Background: I had my IUD (mirena) removed 9/8 after 4+years, had very irregular periods while it was in (cycles ranged from 30 days to 10+weeks). Glow says my cycle is 42 days but I'm not sure that's right given how irregular I was with the IUD in. Anyway, AF came 9/10 and was normal, 4 days. Glow says I won't ovulate till 10/1 but since I was regular (~30 day cycles) way back before I got on BC and then had the IUD I figured I'd check an OPT "early", now day 15 of my cycle. 
​This is what I got... Is this almost a positive? If so, should I recheck tomorrow or just wait till I'm within 7 days of when glow says I'll ovulate to start testing??