What do you think?

I'm 19 years old .I've been told that there is a possibility that I had a cyst in my ovaries . So I've been having unprotected sex like everyday for the past month and a half . I haven't got my period and I've had a lot of nausea and dizziness so I took three pregancy tests but they all said negative.. Do you think it's to early? Any advice... Thank you!