Hello,
Nausea and dizziness are side effects of the Ovidrel shots and if you are having these side effects then they should be evaluated from your gynecologist and then the next shots taken. Nausea is found in atleast 3% of the patients taking Ovidrel shots.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.