TTC and no AF

First post! Just started trying for our first about 3 months ago. I was suppose to start my period today but it never came. I thought it would because I had some major bloating and cramping the day before. That's all gone away and now I've just been feeling nauseous and just "off" all day. Took a test the day before I was suppose to start and it was negative. Haven't had the heart to take another. I get so disappointed when they are negative. Just needed some advice and to vent. I'm new to the app and been reading a lot of supportive things so far! Thanks and good luck to everyone TTC!