Can Taking Entocort Result In Dizziness, Headaches And Palpitations?

Was on Entocort for 4 weeks to try and treat collageal colitis but this did not help. Now, 6 weeks after coming off I still feel dizzy and ill with palpitations and headache and this starts after breakfast of toast or cereal, every day. Can you advise me as to whether this will right itself? With many thanks.