Also... this is my first attempt at using a cup, and I don't know how to tell if I have a seal. I'm on day two of my period, and had a little leakage last night, but a lot less than I usually get with tampons. I have a compressed spinal cord between my L4 and L5 vertebrae in my lower back, so I don't have a lot of muscle control below that area, but my doctor said that I should have "nearly" full sensation. I don't know if the "nearly" means that I'm getting a seal, but I just can't feel it or what.
Any input is greatly appreciated!
Edit: Thanks for all the info guys! I feel better about using my Diva now.