Headache, dizziness, and heart flutterin?

For the past 4 weeks I have been experiencing extreme dizziness that seems not to be associated with anything I'm doing, or any time of the day. Also, it seems that my heart has been fluttering for some time now, and it's growing more frequent, sometimes up to 5 times a day. It makes me feel short of breath for a second, and it's kind of scary. To add to all this, for the past two days I've gotten sudden, unbearable headaches that make my head throb and my vision blurry. They both lasted for about two hours. The headaches both came when I was doing semi-strenuous work, even though I've done that work nearly every day for years. Oh, by the way I'm 18 and a female.

I am a 15 year old male and I had a catagory 3 cuncussion during football season this year and was hospitalized for a day because of dizziness. well 3 months ago is when it happened. and now I am experiencing headaches, dizziness, and I am slow thoughted. and I want to know what is wrong with me because I am very scared of this.

To the male, I'm really not sure, I would think it would have something to do with the concussion, possible brain damage? I don't know. Go see a doctor, is your best bet. I'm only 14. The first writer. SEE, A, DOCTOR. Heart fluttering is NOT good. Doctor, doctor, doctor.

To: The First writer.
For the last 3-4 weeks I have been experiencing the same thing I am a 20 year old female, living in Canada. They are treating me for angina. Did you find out what was causing you heart to race, dixxyness, etc??? If you get this can you please get in contact with me I would love to talk with you.

Take care, I hope all is well!