Anyone else having headaches instead of nausea?

I'm 6w today and have read posts of people having really bad morning sickness and (thankfully) I haven't experienced it! But on the other hand I've been getting really bad headaches. Most of them seem to be smell induced... I have a candle that I always burned (lavender chamomile) and it never gave me problems before but now whenever I light it, it gives me the worst headache. It's not always because of smells though.. yesterday I had a headache that felt like a really bad hangover (without the drinking of course!) UGH IT'S AWFUL. what're you ladies experiencing?