16 weeks and sickness just started??

Jane

So I’m 16 weeks today and my entire pregnancy so far has been pretty easy on me. I’ve barley had any morning sickness and I haven’t had any bloating or anything. However, starting yesterday I’m having the most horrible migraines that lasted all day yesterday. It’s not as bad today but I still have a headache. It’s so bad that it’s making me throw up and Tylenol does nothing for me. Idk what to do! Also why would it have just started? Isn’t the 2nd trimester supposed to be the easiest?