I need help!!

I am a low 80 - high 70s hitter, but I am lucky to hit 9 fairways a round. My main problem is I have an inconsistant drive, at times I have a lovely sice which I compensate for and that usually works, however, at time I hit straight and I go hard along the left fairway! I never know if I am going to hit straight or have a slight slice, this is getting extremely frustrating for my approach shots are great and I could easily lower my score if my drives cod become more accurate and constant! Do you think it would be best to see a pro and tape my swing and see where I am going wrong or right?


Cheers,
Damien