PREGNANT WITH A NIGHTMARE!

I'm currently 20 weeks pregnant today with a beautiful baby boy 👶🏼😇😪😪 but a few weeks ago I felt a lump, a lump which everyone else said it was nothing to worrie about. It scared me to know what it might be and I found out today at the doctors it was a cyst on the left kinda to the right of my ribs. The doctor check it out, and told me that she doesn't "think" that it's anything bad. But I might have to have surgery. I need to know what to do, how to handle the situation, I'm terrified to know that it's near that baby, so I need more info and if anyone of you lady's have had a cystic, tell me about yours. I'm just a 18 year old mother trying to figure out if I should be scared. 💜🙏🏼🙏🏼