getting tired

I'm getting really tired emotionally and physically with TTC. It's just one thing after the next that keeps knocking me down. It's been almost 2 years. Everyone around me is pregnant with no problems. I'm sick of crying. Being angry. Being happy and sad. I'm tired of finding a solution and then doctor saying oops no that's not working let's try this. I'm almost ready to just adopt. Might be an easier process at this point.