You should accept any and all invitations as quickly as possible today. Don't give your more introverted side time to think up excuses for why you should stay home alone. It's essential for you to get as social as you can right now even if you don't feel like it. Forcing yourself to interact with other people will build your confidence and help you get over any bad mood that's overtaken you. Things are looking up, so you have to look up to see them!