Going through a rough time after sickness

For pretense, I’ve been taking cymbalta, trazedone, and trileptol for years. About a week ago I developed bad body aches and a low grade fever. Thought it’s the flu and stayed home from work. Fever only lasted a day but developed bad diarrhea and lost appetite. On day 3 I developed severe brain shock feelings. Day 4 and 5 anxiety increased to the point of not sleeping well and not being able to take naps during the day due to the fatigue of the flu. Anxiety had been kept in check really well before the “flu”. Now it feels like my meds aren’t doing anything. Constant anxiety attacks. Brain fog. De-realization. I tried taking hydroxizine this morning when I woke up at 130am and couldn’t fall back asleep but now the hydroxizine is having the opposite effect on calming, giving me severe anxiety and instead making my muscles feel like they’re on fire. Could this all be from the flu?