Overwhelming place symptoms and conditions

I was prescribed singular on Friday for my asthma and allergies - I took the first dose on Saturday night - slept like a baby and felt really great Sunday (the best I'd felt for a long time!) but that changed Sunday night - after taking my tablet I went to bed - it took me until 4 am to finally fall asleep because of the noise in my ears and this overwhelming feeling of unrest in my mind and body. Around 4.30 am I apparently woke my daughter by leaving my bedroom sleepwalking - I even managed to change the top I was wearing before loudly opening and shutting my bedroom door then walked half-way down stairs turned then went back to bed - I'm 44 and never, in the whole of my life, walked in my sleep! All day Monday I just didn't feel myself like the world was an overwhelming place to be! I didn't take the next dose but feel absolutely drained and on edge - I'm told it'll take a few days to completely leave my system - wish I'd never even tried it!!!!!