By all means, check with your physician, and explain thoroughly why you believe you may want the benefits of creatine. Remember that anything you put into your body, even over the counter items, have potential risks, no matter how benign that substance may be viewed. (eg. Tylenol overdoses are one of the leading forms of suicide means among teenage females).
That being said: There are many different types of creatine, and not all people respond to each creatine type in the same way. For example, I tend to bloat with creatine monohydrate, but do not have the same GI water retention and side effects with other types of creatine. Do some research online. Educate yourself, as you may have to educate your physician so you can both be on the same page. One type of creatine that may be of greater benefit to you is creatine ethyl ester (CEE) as it perportedly has better absorption, (ie, minimal water retention) compared to cr. monohydrate. It is, however, generally more expensive, and as most studies have been done using cr. monohydrate, you may have to gauge your own individual response to it's degree of usefullness.
As others have stated, though, check with your doctor, as the risks may outweigh the benefits.