I hope it's not the first thing in the am. All you have to do is call your MRI place & ask for the nurse, they can answer your ? Remember there is no stupid ?'s in this USA.
As long as there is no metal like a staple or anything in it that has metal, which it shouldn't have since it would scratch you then it is ok. The main thing is to not wear any metal.
I had another thought, where is the MRI going to be taken, not of the pelvis or female areas? If it is the low back I don't think it matters. It is only for about 20 minutes-1 hour so you could wear a pad during that short time.