I'm so sorry you're feeling so badly.

First off you need to stop researching on the internet your symptoms, it only makes your panic and anxiety worse (trust me, my therapist reminds me of this every week).
It sounds to me like your disassociating a little because of stress. Your mind is basically like WTF and trying to remove itself a little so you don't have a panic attack.
Also if you're starting new antidepressants its completely normal to have dizzy spells, vision problems, etc. for the first couple weeks.

This is a hard time right now for your brain with the addition of new medication, the emotions that come along with being a woman during that time of the month, and the stress from your finals.

Things will get better I promise. In the mean time, try to relax and think about things other than depression and your symptoms. Listen to some soothing music for anxiety on youtube. Do yoga. Watch a funny show. Do breathing exercises!

Just remember that you are strong and you can handle this!