I'm a 43 year old male. For the last 3 months I've been getting stomach aches, headaches, light headedness, nausea, sudden tiredness and bad wind. Toilet wise everything is normal. I'm very fit for my age (cycle over 10 miles a day to work and play football once a week), plus I eat mostly healthy food. I hardly ever get ill yet recently I've also had 2 ear infections and had 2 bouts of flu. I feel like I'm run down, except I'm very happy/unstressed in both my work and family life. Any ideas?