Steroid Withdrawl Symtoms. Please help.

I was prescribed with omnacortil tablets in tapering method. Dosage was 40 mg for 3days then 30mg for 3 days and then 20mg, 10mg, 5 mg respcetively for 3 days each. Before taking this i had predmet 4mg for 2 days and that was 2 tablets each day. I had omnacortil 40 mg for 3 days and then had 30 mg for 3 days and then i stopped it because from the very first day of omnacortil i started having foggy brain fatigue and change in my vision and then after couple of days weakness and many other problems. Its been 4 days i had my last dose of 30mg but still i am facing the same issue. Brain fog or brain fatigue and weakness is the main issue. I heard about withdrwal symtoms of steroid. But is it possible to face this problems after only having it for a week and if yes how much time will it take to be normal again and are this symtoms actually the withdrawl symtoms of steroid. Please help.