This is a potentially very serious situation. It is not sinusitis. Something has compromised the circulation and/or nerve connections to your eyes. You may have had either bleeding from a blood vessel or clot formation in one or more blood levels. Another way to look at this is as a possible mini-stroke.
A less serious but unlikely possibility would be migraine, but with no prior history that would be especially unlikely.
The most important thing is that you act quickly at this time to get medical assistance. You should call your doctor and advise his/her staff that this is a medical emergency and that you must speak to him/her immediately. If you are unable to make rapid contact with your doctor, have a friend or relative drive you to the nearest, large hospital, emergency room (ER) and, on arrival, inform them that you may be having a stroke and this is a true emergency. If getting a person to drive you to the ER, is not feasible, call 911 or have someone else call 911.