4 weeks on my period

Hi ladies,

Today marks 4 full weeks on my period. I’m feeling dizzy and nauseous. I don’t know what to do. I feel like I might throw up and I have the biggest headache. I’m really scared and I don’t go to the OB until Friday. I’m not yet diagnosed with PCOS and not on any type of birth control but I know I have it because I have all the symptoms and it runs heavily in my family. I feel hopeless and am seeking advice from anyone who knows what I should do in the meantime. Please help.