I had my nails done throughout both of my pregnancies, including the UV light to set the top coat, and everything was fine. If you're concerned, you can ask the person doing your nails to use a top coat that does not require the UV light.
No you have nothing to worry about it affects your baby when you do them often & when further in your pregnancy .
You will be fine lots of girls I know came into the salon I worked at while pregnant and had healthy babies... The main concern is the fumes. But what's done is done. You will be ok dear and so will ur baby ! They just want to limit your exposure to the fumes bc they are so strong