Hi Rina
Is your head back only? Or have you pushed your hips forward first and then your head is back? Are your hands on your lower back?
A couple of things to try: See if you can pay some attention to the sensation that your hands against your lower back. It’s possible you are paying too much attention to the stuff that is not serving you! Make sure you are also looking back. Once you get hooked into that dizziness it can be very hard to keep looking backward.
Namaste
Gabrielle 🙂