hi, need some help here!

Carolina

So I was supposed to get my period yesterday and Im always punctual I have regular periods. So I took a pregnancy test this morning first pee of the morning and it shows a faint positive but I have cramps like when Im going to get my period. I called the Ob office and they told me just because I am 1 day late it might be a false positive and just to wait and give it a day or 2 to see if I get my period as Im cramping. I took a second test a digital one with my third pee of the day and it says not pregnant.. please give me your opinion on this!! Thank you in advance!