IMHO, first injuries can prove the effectiveness of Aikido. Its also a great opportunity for you to learn about yourself. If you heal up and train, my compliments. If you become fear based and avoid training, perhaps the martial aspects are not for you. Injuries are part of training. Don't take it too seriously or too personally. Learn from it.
Relax, breathe, and enjoy yourself. Now, get back on the mat and do what you can.