A while ago when i was at the train station i started to feel sick,
Pain in my stomach then when the train came and stood up my vision went black for about 30 seconds i struggled to keep upright and then when a bit of a vision returned i got on the train and my vision came back fully.

Now today i was at a party with family and my cousin made a few pictures of me with flash on about 4 in a row, and my right eye became painful and weird around the edges, and i got this headache right between the eyes.
I also often find myself tired, i sleep 7-8 hours a day and in the afternoon i need to sleep about 2 hours to stay awake in the evening.

I do wear glasses and im 20 years old,
Might there be something wrong or am i just paranoid?

Thanks!