Finally found out why we can't get pregnant with #3

So we have been trying for almost a year now. Finally started going to the doctor to see what's up. 1st visit I did blood test(all of that came back good and normal) not only have periods been out of whack all of sudden and went irregular but my mood has changed. 2nd visit had an ultrasound done, after two days of waiting for the call back I got news I didn't want to hear. They found something really concerning on my left ovary. So now I'm having to do another ultrasound and see a radiologist. I'm mixed emotions right now. I'm happy because we finally found out what is causing this but scared at the same time.