Am I pregnant?! Please help I am so confused:( this is crazy!?

Okay me and my boyfriend was doing the deed on may 27th and the condom broke! It has now been 35 days sense I have had my period. Yes I know hats a long time but my periods are irregular anyway. But here is the crazy part, the Saturday before last I took a first response pregnancy test an it came out positive. I'm not for sure if it was expired or not. Then I told my mom I thought I was pregnant and she made me take the dolled store brand test and it came out negitive!!?? Did it lie!? Or did the first response give me a false positive? I've not been sick or nasues but I do have these little bump like thing around my nipples. So idk what to make of it all. Some one please help meee. Thanks sooo much:)