Is stuttering just something I should get used to?

Hi, I'm samantha, and I'm 18 years old. I was diagnosed with epilepsy in august. I have never stuttered before in my life until I started taking higher doses of my medicine(keppra). I take 1000 mg twice a day. Is that a normal thing? Or something I should worry about? And a lot of the time I'll be talking to someone, and I'll have this moment where the word is like on the tip of my tounge, but I can't but my finger on it. Or I'll walk into a room, and forget what I was going there for, then like 5 seconds later I'll remember. Are things like this normal?