Dizzy spells!

Hi all 😊 I'm 16 weeks tomorrow and this last week I've been having the most horrid dizzy spells. not like the ones I got earlier on when I stood up too fast, these happen when I'm stood, sat, lay down and last maybe upto 10 minutes. everything checked out fine at doctors and blood tests came back normal. doctor said likely just my hormones causing it, but was wondering if anyone else is going through the same? really don't like the feeling as I feel as though I could pass out. 😣