December 19th CD 18 1st pos OPK

I know it's very pointless to test everyday after getting the first POSITIVE OPK, but I did it to know when to stop having sex, or to just keep tracking my ovulation. Well ya here we are 5 days later and they are still positive, can ovulation tests detect pregnancy?!!!! What if I ovulated before I started the OPK tests and I'm actually pregnant, I've been cramping a little and have a weird taste in my mouth, every time I log a positive LH surge on the app, it pushes back my period. Can any one help?! And please don't read without IMPUT I love this community despite the fact I just started using the app at the beginning of last month, but I've noticed if someone isn't premium or their post isn't of popular nature you guys don't comment much,. So ya I would just like some insite thank you ladies ! Lost of love baby dust!