10 week symptoms

Hey all, I just hit the 10 week mark.  I have only felt sick a couple of times the whole pregnancy, the last sickness was around 8 weeks however today I woke up with a huge migraine and just felt out of it. I slept the majority of the day and once I woke up I still didn't feel right, no appetite and then a couple hours later I threw up.   About a hour or 2 after I got sick I felt fine again. Is this normal?! I'm freaking out worrying somethings not okay! Advice?!