Starting lamictal tonight

What should I expect starting this medication?

I am currently on Wellbutrin. I was taking 75 twice a day but she want me to only take it once a day while I introduce the lamictal.

My previous psychiatrist diagnosed me with bipolar 2 years ago. I have been off medication for a year and was doing great so I thought maybe the diagnosis was wrong. But I started to have really bad time so I saw another person. My new doctor also thinks I have might have bipolar but she wants to see how I react on the lamictal.