I'm sorry you were having a bad day. Hopefully, today will be better.
About your cat, wrap him in a towel so that he doesn't claw you.
Putting contact lenses in isn't hard. They will show you the proper way and once you've done it a couple of times, you will become a pro.
Hang in there.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.