I feel like I am going crazy (rant)

Raine • 28, Mommy to 1 son & 1 step daughter & 1 daughter. Nerd. Web Designer. Books. Netflix. Food.
I think I need to rant. Plus some good luck ... 
I recently found out I have a teratoma on my ovary. A teratoma is a tumor or dermoid cyst ... So I am being explained. Correct me if I am saying it wrong. It looks ugly and I kinda wish I didn't google/YouTube it lol, but I'm nosey. 
TTC is obviously put on hold ... and now I'm understanding why it wasn't happening. In a few hours I go to my 1st appointment with a specialist to talk about removal. & of course to ask 21 questions about how hard it will be to TTC with only one ovary. 
I've been kinda gloomy about it. Anyone TTC with one ovary or have been pregnant? I don't think I'm super duper fertile. It took me about 8 months to get pregnant w/ my son. Which is technically average. I guess I feel less than average because one of my good friends seems to simply say she wants to get pregnant and boom she's pregnant.
I've been trying to ease my mind but it's hard. Considering I have a son (he's 4) from a different relationship and s/o has a daughter (5) from previous relationship we aren't completely heart broken over the idea of not having another one. But I really really want just one more and before I'm 30 (I'm 25). 
Thanks for listening!