Very bad senior year grades due to extenuating circumstances. Will colleges actually factor this in?

Up until 12th grade, I’ve had a 4.4 GPA. Earlier this year, I was diagnosed with ADHD and put on Adderall. It helped me during school, but once I got home, the Adderall wore off and I crashed. The crash was so severe that I couldn’t do my homework and it also made me very depressed. Now, I have 3 Bs and 4 Cs. My doctor has recently switched me to a different medication, but I don’t think I can get out of the hole I dug. I am aiming for T20s. Am I screwed?

You need to meet with your guidance counselor, and make certain that your counselor will put a note in his/her comments to the effect that you have had a medical issue this fall that affected your ability to perform well.