So depressed!

I’m getting so depressed and tired of this! I don’t know what’s going on with my own body anymore! I feel so confused! We’ve been trying for a year and a half, we’ve had every test imaginable, there’s nothing wrong with either of us and I’ve tried everything! I keep trying to stay positive and just figure we’ll maybe next month, but now I don’t even seem to know when next month will be! I’ve been late by about a month last month and 9 days so far this month! Or am I early or do I have a long cycle or do I ovulate late? I don’t know! I don’t seem to know anything anymore! I’m sorry that I’m ranting, but I’m just so frustrated! Why is it so hard!?!