Cyst on 22 week ultrasound

I am 22.5 weeks pregnant and my doctor just informed me the baby has a very small cyst in its abdomen. She told me not to worry, and that these things can often go away on their own. She also noted there are no other abnormalities. I am very worried and anxious though. Has anyone else gone through anything similar? It has taken us 5 years to get pregnant and so every little thing stresses me out. Which I know isn’t great for baby and me... ugh. Anyone else go through something similar??