I'm 15 weeks pregnant and for the last week I've been struggling with dizziness and severe headaches during the day. Every time I get up, no matter how long I've been sitting or what position I've been sitting in, I feel light headed, dizzy, and the blood rushes to my head. My head will throb and pound so bad I have to stop what I'm doing and wait for it to stop. I've tried everything to getting up slowly to sitting in different positions. I'm not sure what's wrong but it's really scaring me. I have a doctors appointment on Tuesday to address the issue but until then, any opinions? :/ thanks for your help.