Faint line on OPK 3-5 days before AF due?

Hi guys! Hubby and I have been trying for baby #2 and AF should be here in 3-5 days. I have a ton of OPKs and decided to take one for the heck of it. I got a very faint line. I wonder if this means I could be pregnant? I got a dark positive opk on the 12th so I know I definitely ovulated on the 13th. Does anyone else see the line on this opk? I tried various lighting. It’s definitely there in person lol. Fingers crossed this could mean I’m pregnant when I take a test next week!