Switching from Clonazepam to Alprazolam.

Hi, I am on anxiety medication from last 1.2 years...these were my initial doses when I started the medication: Morning: 0.25 clonazepam Night: 0.5 clonazepam+dothipin 50mg. The clonazepam dose was reduced over the last one year and I was successfully able to that even though I had withdrawal symptoms whenever the dose was reduced. I had come down to 0.25 clonazepam only in the night with dothipin 50mg. Now it's been a month, my doctor switched me from clonazepam 0.25 to Alprazolam 0.25.He said I have to take half of the alprazolam, and then have to make quarter and then need to stop at one point.Along with alprazolam I'm also taking dothipin 50mg. Since the time I have switched from clonazepam to alprazolam life has become difficult. I am getting all the anxiety symptoms.I am not understanding if it's the withdrawal symptom. If it's withdrawal, is it because I stopped clonazepsm? Why do I feel withdrawal even though I'm taking equivalent medicine.? Please help.