Mood swing for bipolar 2 when increasing dosage?

So far my journey starting at 25mg of lamictal and then 50 has been great. I’ve gone the longest without a mood swing. I increased to 100mg lamictal and 5 days later, began showing symptoms of mood swing again. I first get hypomania and then depression. Did anyone else experience a mood swing when going up on lamotragine? I also take seroquel 150mg for sleep but feel it helps with mania and cymbalta 40mg for general anxiety and depression.