47 days and no period with negative results

Hi all. I need some Help/opinions.

My period is pretty irregular, it doesn't come at the same time every month. I had it towards the end of December but then skipped all of January. But my last one was February 3-8. And if once that was over, my husband and I started trying to get pregnant. It's been 47 days and I've taken 3 tests and all negative.

So, I was just wondering if anyone has been through this. What can I do? I'll take anyone's advice / opinions.

Thanks for reading if you did!!! :)