Easter weekend - energy drink sickness

Most intense period of riding for a long time over easter. 90 mins around the park on Thursday, 4 3/4 hours around a VERY wet Marlow on Friday with Stevie - soaked through - followed by a hard 4 1/2  hours around the south downs on  saturday. Absolutely exhausted but great riding - tested the leg with some sprints and all seemed well. Keep the fingers crossed! However, had consumed so many energy products (drink, bars and recovery shakes) that my digestive system went into melt down. Gym on Monday for weights and another 90 min ride this evening. Things are getting serious.