What happens if i eat fungi or mold, what ever it is that gets on old bread?

4 days ago i ate bread that was new and never opened and i ate about 10 pieces of bread and my brother noticed later that there was blue fungus or mold whatever it is on his bread as i was about to bite into another piece and i looked on my piece i was abut to bite and there was blue mold or fungi on it and the next day my stomach woke me up and 5 o clock in the morning and it started hurting and i thought i was hungry so i went down stairs to eat sum cereal and a cereal bar then drank apple juice and i went back to bed and my stomach was still hurting and i was not full i was just right and i was not hungry so does any one know if the fungus or mold did that to me and it still feels like that to this very day and every time i lay down to sleep thats when it hurts the most and when i sit down so any info on what it might be please !!