I was diagnosed as with IBS about 4-5 weeks ago. Total diet change (no meats,dairu, fatty/fried foods) and natural remedies such as Peppermint oil, metamucil and probiotics. Several days now, no stomach pains at all. Today, I did some yard cleaning and lifting to move several heavy items followed by small pasta lunch. 5 or so hours later, my stomach still feels full, then very tired, weak with lightheadedness and ear ringing.Even my eyes feel sore . Laying in bed now weak and anxious. Is it physical work causing this or weak from such simple lunch or something else?