I am 33, I want to have a BBL this year and get pregnant next year, will it ruin my surgery? Should I have a baby first?

Hello dear!
Thanks for the question and provided information as well.
I recommend you to wait after having the baby, for the BBL; a pregnancy can affect your results.
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less.
l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)

Pregnancies can wreak havoc on the body and change the surgery outcome by the addition of fat and hormones.It is almost always wise to get through your pregnancy first!We perfrom Brazillian Lifts as well as Butt Implants !Dr Jeneby

Without question, complete your pregnancy and baby plans first!  The hormonal changes in your body can be unpredictable and combined with aging changes we all experience, you want to control or have behind you as many of them as possible before surgery.  Best Wishes!!!