ive been working out for about 8 months now and im noticing that my upper right side of my body is getting bigger than my left. its mostly in my forarms and my lats. can anyone tell me why this and how i can help fix it.  any advice would be awesome thanks.

Fistly don't worry too much about it (I have no peak on my right bicep it's about half - 3 quarter inches smaller than my left due to me not having a thumb on my right hand there are no nerves from it to stimulate it wont change so time to get on with it) anyway enough about me        

Switch to single arm rowing, pull downs ( would advise ALL pulldowns are done to the front of the shoulders to prevent future shoulder problems) low pulley rows.

the reason one side is bigger is usually down to one side being stronger.
I would advise you to do as many dumbell, single exercises as possible ie bench press, shoulder press, pulley rowing, also do this for legs to maintain equal proportions

hope this helps