Tulle wedding dress is wrinkled

My dress has been at my moms house hanging in a closet in a garment bag (this is how my bridal salon told me to store it) since I got it in May. It has many layers of tulle and the train is somewhat big and long. Because of this, the bottom of the dress is bunched up in the bottom of the garment bag and when I took it out today to try it on, I noticed the tulle is wrinkled. First, do you think this is okay and I can continue to store it this way until it goes in for alterations in a couple months? Second, how am I supposed to avoid this from happening after I pick it up from being altered? I read online not to steam it yourself as it can cause discoloration so I am worried how I’m supposed to store and transport it between alterations and the actual wedding day.