Okay, you need to take a breath and relax. Your symptoms are not due to a space-occupying mass such as a tumor, which produces clinical signs and symptoms long before you start experiencing pain or other sensations.
There are six muscles which move the eye and it can be very common for any one of the these muscles to experience strain, much like a sprinter might experience from running at any given time. The initial symptom of pain on elective movement of the orb is an indicator that muscle strain was quite likely the original insult.
Seasonal allergies can also produce swelling of the mucous membranes which lie proximal to the eyes and can cause inflammation. The affected eye or eyes typically appear red and glassy in appearance, with tears being expressed more than usual.
Once pain subsides, movement of the affected eye can feel foreign for up to several weeks because the eyes are rather incapable of having their movement restricted in order for the muscle(s) to recover more quickly.
You'll be fine. Again, this is not in any way associated with the presence of a tumor.
Spend a bit less time on activities that require rapid sacadic or pursuit movements, both necessary to track objects in the visual fields. Computer time should be restricted as well, since it produces strain upon the eyes in general. Also do not rub or otherwise prod the eye, or engage in extreme side to side gaze in order to test the sensation, but rather let it alone. You'll recover from the odd sensation more quickly.
Best regards,
Rutheford Rane, MD (ret.)