Chemotherapy side effects

I’ve just had my 2nd chemotherapy treatment of EC the first one I wasn’t well at all, had sickness, diarrhoea, what I thought was ulcers in my mouth the day after but turns out I had passed out and bit my tongue, I remember coming round on the living room floor but thought I had just lay down, fallen asleep. My appetite was off for a week. This time I felt ok just a bit dizzy later on, I had gone to the toilet early hours come around at the top of the stairs, had bit my tongue as same massive ulcer at the side. I was very confused, had wet myself, didn’t know what was going on according to my daughter. My theory is the chemotherapy is causing me to have seizures. I was hospitalised for 3 days, I did mention the things that happen every time I have chemo treatment and nothing like this happens any other time. I’ve been put on anti epileptic drugs while I carry on the treatment and I’m hoping I don’t have anymore episodes. Has anyone else had these sort of side effects? I know seizures can happen due to dehydration and low sodium levels in your body. What I can’t understand is I had plenty of fluids throughout the day and had electrolytes so what could be the problem? I’m very worried about my next one now.