Billiard question! about stroke!?

I'm not a beginner, i do win 1st place 2nd place once in a while. I do need an opinion from an A player though. It seems like I always change my stroke every once in a while which ever works the better, but after a week or so it changes and not working as good as it was then i'm thinking that i might be doing it wrong then here comes another stroke. And it just keeps happening. Should I just go with the flow? or should i just stick with 1 and try to master it? If you've been playing alot of pool you should know what I mean. What's youre best opinion?