Cystitis again :(

Well, the last episode eventually cleared up - I stopped drinking tea and coffee, and it finally went. Now, however, I've got cystitis once more. This time, I had to take ampicillin for a gum infection around my wisdom tooth. It gave me diarrhoea and thrush. Yesterday morning we had sex before getting up. First time in what feels like ages, used a condom, but nevertheless, I woke up at 2.30am this morning with cystitis and the shits. Took some sodium citrate and a paracetamol, and also drank a few cups of hot water, but too painful to get back to sleep. Suspect this time, problem caused by the fact that I hadn't washed, have diarrhoea (so probably higher concentration of bacteria than normal down there), and probably also imbalance in the internal ecosystem as a result of taking the antibiotics. Did put a probiotic capsule inside yesterday to try and sort out the thrush/prevent cystitis from occurring. Has helped with the thrush at least. It would be so good to be free from problems with my lady garden.