banx,

Good news, there is a cream that you can use!!!

Its called Schuessler Tissue Salts Cream Muscle relaxant.

It has Mag Phosphate in it and it is absorbed into the cramping muscle and helps. Footy players use it in a game and i used it every time i had a cramp in my pg it works a treat.

Make sure that you are drinking enough water as cramping is very often related to being a bit dehydrated...

i put the cream in the lounge room so i had to get up and walk on the leg so i would stretch it out at the same time.
If you use the cream one or twice a week as a preventative i ffound that helped too. but upping my water was the best way to avoid them all together
HTH