Pregnant teen with a question

is there a diffrence in bra sizes when you are pregnant and if I wear a size 38c what size would I wear now?

With pregnancy your breats will grow. It's important to wear the right size, many stores can help you choose the size that fits you best. Before going to the store call and ask if they offer that service. They will measure your with and make you try different types of bras to find the most appropriate.