Do you think I should wear a bra? ?

Well. I don't have ... XD. tttt. My show through my shirrtt. I'm In middle school (6th grade) and all my friends pretty much wear one! I really don't have that big of s. Baaat I'm not flat chested. My mom has not said anything about it or nothing!!!!! Agh!!! So I wear a training NRA but that doesn't do shiz! Like fughh. Anywho I don't want a non padeed bra. I WANT A PADDED ONE. I need your opionion on this. Thabkyou