Not really sure where to start, so I will start from the beginning.

About 3 days ago my face was itchy, mostly around my mouth and chin area, and then it moved to my nose. Well I woke up today with an intense itching sensation around my eyes. Around my eyes was also slightly red. I went to the aid station (I'm in the military) and without doing a workup or anything, they said it was an allergic reaction and gave me Lora tabs, which I took one immediately.
After being around for a couple of hours I started to get this weird headache/pressure that is focused behind my eyes. It feels like my eyes are going to bulge out of my head, and I'm extremely fatigued. The headache/pressure is so bad that I feel 'out of it', I don't seem to perceive things like I normally do. I'm slightly unstable on my feet because of this and I would like to just turn out the lights and go to bed, but I can't. My face and my eyes are still itchy even after taking the medication I was given....not sure if that has anything to do with my headache pressure or not, but since it started about the same time I just don't know....

Does anybody know what this could be? (I don't believe it is allergy related because of past experiences with allergies)
Thank you to anyone that offers any insight