1 year of trying to have a kid and still nothing...

I've been trying for 1 year and 2 months to have a precious baby.. every month it seems like i feel pregnant since I do have irregular periods or I feel some sort of different.. but everytime i take a pregnacy test test, it brings me down. We never had protected sex and we have been trying atleast 5 to 4 or even 3 times a day. I tried to put my feet in the hair for 5 mins, nothing, i waited until I was fertile, nothing. I dont know what it is :( please help