How many innings have you thrown this spring/summer? How does your arm feel? What is your current velocity? You will get tons of opinions here, and there is no right or wrong. I'd say if you haven't thrown a ton of innings (?? 75 or less??) AND your arm feels good (as in strong and healthy), continuing to compete and battle vs. good competition would be best. You could schedule a few sessions with P instructor to fix any major mechanical flaws. Control issues come and go, too...can be mental thing to work through as well. You should have an arm care program and light, maintenance type lifting program you can do during the week and throw on weekends. If you want to play in college, this Fall will be important to start to get some exposure. Should be able to plenty of heavier, off season lifting starting Nov. Either way can pay dividends down the road if done correctly. if you were a year younger, I'd feel more comfortable saying take the fall off and work hard on legs, core, etc. Also depends on your current velo, if it is too low, there is no need to seek exposure to colleges.