I too, keep tabs on the cognitive stuff, because that's a key indicator of the status of my depression. I do know that as graduation approaches people can get scared. The predictable structure of school will stop and then things are wide open. That can be intimidating. To be scared is a normal response to some things.

Feeling depression for the first time can be very scary.

Also, it sounds like the medication is relatively new? It often takes time to have an effect. Talking to the doctor is always a good idea, especially if you're early in the process of finding the right dose of medication.

Hang in there. I'm much older than you from the sound of where you are in life, and I have lived with depression a long time. It gets better. Try not to isolate; that makes it worse. Getting out into the sun and fresh air can help. Knowing that your thoughts are only thoughts and not reality can help. Knowing that you are not your thoughts can help.

People are here for you.