Could I Be Pregnant After Decapeptyl Injections For Endometriosis And No Periods For A Few Months?

Hi I was on the decapeptyl injection 3mg for three months once a month for endometriosis pain my last injection was January and I haven’t had a period since October I got 2 positive pregnancy tests and 2 negative what are the odds I could be pregnant I’m also on folic acid for low iron