Dollar Store pregnancy tests?!

So my fiancee and I have been ttc for 3 months now, we were at our local dollar store earlier today and decided to buy 2 pregnancy tests just for the helluva it. I was a couple days late starting my period but it's been a little all over the place lately so I didn't think anything of it. I took the first test and to mine and my man's surprise it was positive, so I took the second one and I was positive as well! Can this be? Are dollar store tests accuarate?