Indent or very very faint positive??

Would you say that this is an indent? It’s the Wondfo brand. It’s been 15 minutes. It pretty hard to get a good picture but I see something. I’m not sure which dpo I am on cuz my OPKs seemed to have possibly gotten positive twice. I looked at this test at the 5 minute mark and started to see a SUPER faint line. Almost couldn’t even see it. But didn’t actually take this pic until 15 minutes.