New to this app, unsure what to think..

Naomi
So my last period I had was end of September the 27th to October 4th. I havent had a period since, I have taken 5 tests and they all come up negative. Anyone have any idea what may be going on with my body?? I dont smoke, I dont really drink, Im slightly overweight, and we have been trying for quite sometime and I am unsure what to feel..can someone please help?