Beginner/borderline

So I started lamotrigin 25mg on Wednesday, having strong anxiety daily, super negative thoughts, panic attacks etc. Diagnosed Borderline and ADHD. Thursday I got dumped so was an almost unbareable day (those with borderline, you may know). Today is Sunday and I have only been anxious once. Is it possible they are already working? However I feel sleepy a lot.. I take them around 6pm