Hi Sara,

I suffer from this very often, it did start around the 18 week mark for me. I've fainted twice and get the dizzy spells often. I have started taking iron supplements as my iron levels were low which may have been contributing to the dizziness. Perhaps you should ask for a blood test next time you are at the doctors to see if this might help you. Apart from that drinking lots of water and staying out of the heat is helpful. The heat seems to drain me of everything then I feel weak and dizzy.