Needing some reassurance.

I was supposed to start my period the 11th of this month and all I did was cramp that day. Now it's the 16th and all I've done was cramp but still not period. Also I've taken tests and they've all been negative. Has anyone had these symptoms and ended up getting a positive. Me and my husband have been trying for 2years and this would be amazing. I wanna trust my body and believe this could be it but I'm afraid to. Any advice? Called obgyn and she said to wait two more weeks and if I dont start by then to make an appointment.