Hi, i'm dizzy.it takes days.sometimes i can't stand up, i have gained weight lately. i'm healthy and not pregnant.it's more during sex.how can i stop it?

See your doc: Dizziness that lasts days could be an abnormality with your inner ear, or maybe something neurological ... Definitely see your doc for an evaluation.

Consult endocrinolog: Dizziness can be due to many reasons. With weight gain, I am concerned you have some hormonal issue. Also high blood pressure can be associated with these symptoms.

Do something: Or it might not stop. You can stop wondering and take some action. Something is apparently wrong, and requires attention. You should consult your dr and get checked, maybe some basic labs and examination will help explain all this and let your dr fix it.