You have done nothing wrong. You answered your question. You are dehydrated. You need to drink warm water with Himalayan salt which should help. If not buy Trifala, Ayurvedic powdered three dry fruits, very effective in keeping bowels moving. Also you can try one tbsp of Epsom Salt in warm water. But you must drink enough water.
To think about your health all the time is not obsessive. You should do all cleanses and be watchful of what you eat. It becomes your lifestyle.