Hi, your question has been assigned to me. you said you are diagnosed with overactive bladder. Did the doc tell you what could be the underlying cause in your case? Treatment/management depends on that. This question falls under the domain of a urologist. All I can do is give you a couple of self help suggestions and encourage you to seek further consultation with him.
Next Steps
1) Do Kegel's exercises of the pelvic floor muscles for about 45 days. This will help you in gaining better bladder control