Am I Weak???

Why am I so weak??? I always feel dizzy recently during training. I feel that Im useless. Im dizzy because I didnt take lunch before training. I woke up at 1345 today. So I just take my "breakfast" at 1400. Then go to training at 1645 as Li Ying wants me to become her partner for her grading. I dont feel really good when Yi Jing starts to throw me. I can see lots of "polka dots" and I cant even stand properly. Then when randori time, I dont have the mood to play. I just let them attack me because I dont really feel good. I wanted to stop randori but I think I still can tahan but... I cant... Feel like giving up... And I did... :( When I fight with Ah Wee, I stop halfway. Why I so lousy and weak??? I dont want this to happen everytime. Even if I have taken my lunch and dinner, and also I go to bed early but I always feel dizzy. It is mentally or physically weak??? I dont want this to happen anymore.......