My husband is impotent; divorce is no option as I have special circumstances.
Is it Ok to resort to other options like sex toys?

There is difference between reducing one's sexual desire [when one is unintentionally aroused] and intentionally arousing it for sexual gratification. Some scholars permit masturbation in a situation when a person is sexually aroused and he fears committing fornication. Likewise, masturbation is permissible between spouses or if any of them practice it while imagining his spouse.