Your diagnoses will not stop you from being accepted to colleges or even make it less likely. You don't need to tell them. Future employers are highly unlikely to find out about your diagnoses unless you're posting them on Facebook etc. You probably won't be telling them either. Your ability to get out and work after you get your degree is only limited by how your diagnoses impact you.

Having said that, Ice has made some excellent points that I hope you'll consider. Sending big hugs.