OPKs as Pregnancy Tests

Has anyone taken an OPK strip test as a possible indicator of pregnancy? If you were pregnant, how positive was your OPK? Pics!! I had a vvvvvvvfl yesterday, but only have one more frer. Meanwhile I’ve got like 40 OPK strips sitting here. Figured I might as well use them 🤷🏼‍♀️ Also wondering how positive an OPK would be if you’re not pregnant but real close to af coming. The one I took yesterday was pretty positive