I’m in the UK. Picked up a bad case of what I thought was food poisoning at the start of October. Symptoms started two days after I went swimming in my local c

I’m in the UK. Picked up a bad case of what I thought was food poisoning at the start of October. Symptoms started two days after I went swimming in my local council/municipal swimming pool, and lasted about 9 days. Wont go into details but at one point I’d lost 7kg. I didn’t eat any solid food for 8 of those days and had under 100kcal a day for about 7 days. Electrolyte tablets, water and Imodium was it for a while. One night I had an amazing fever with delirious dreams. Had an average HR of 150bpm for 9 hours of “sleep”. Took two weeks before I was back to normal, still 4kg down on where I was before - which is nice. Sounds very much like it could have been cryptosporidium. I’ll never know for sure as I didn’t send a sample off (had a chance to via my doctor but didn’t see the point). Haven’t been back to my local pool yet though.