Yup now u can sleep whatever position you want, by 3rd trimester its not good to sleep on your back. Supposed to be better to sleep on your left than right but trust me u won't be able to sleep well and too long on one side and have to wake up constantly to pee as well. So try to sleep more while u can now!
Your baby’s not very big at this point. Sleep in whatever position is comfortable for you:) take care!