No, progesterone doesn't cause a positive pregnancy test, only hCG does. But if you are taking any trigger shots, that can cause a false positive. Please consult your gynac to do a blood test to be absolutely sure.
I completely understand the anxiety of waiting for that double line. Progesterone support (pills or injections) might cause pregnancy-like symptoms like sore breasts, but it won't cause a false positive urine test because kits only detect hCG.
Actually yaar, progesterone will make u feel super bloated and tired like you're pregnant, but it won't change the test result. If you see a positive line, it's highly likely you are pregnant! Go get a blood beta hCG done to confirm.
Beta, progesterone se positive test nahi aata, test toh sirf hCG hormone se hi positive hota hai. Apna dhyan rakho, thoda aaram karo aur kitchen me jyada bhari kaam mat karna abhi.
When I was trying, my mother told me not to worry about these medicines. Progesterone just helps support the pregnancy, it won't make the test positive by itself. Take rest and let your family take care of you.