Thanks for the query.
pills can cause side effects as bloating
sensation of the abdomen, cramping etc.
It will take sometimes to get adjusted for new brand.
Possibly the symptoms will decrease soon.
You can take symptomatic treatment till then.
If the symptoms persist you may go back to your previous pill.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429