STRESSED, don't know why?

Recent symptoms:

tight jaw, not teeth grinding (pressure, causing jaw pain)

teeth impressions on tongue (bleeding tongue just with constant pressure/tension of mouth, PAIN)

less sleep (7-8 hours down to 4-5 hour)

Memory blackout (cannot remember whole day)

lighter skin

bloodshot eyes (in morning)

pain around eyes (in Morning)

lower energy levels (no effecting daily routine YET)

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absolutely NO drugs and Alcohol used PAST/Present

eating normally (well balanced, not a nutrition problem)

well hydrated (drinking approx. 75% bodyweight in ounces daily ex 4 LBS=3 oz) (per doctors 100% is perfect health, 64 oz daily minimum)

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only thing i can think of is trying to figure out why i had a blackout.

"too much stress" (can cause blackout)

"why is my jaw tight" (tight jaw can cause lose of blood flow to brain, leading to blackout)

Any Advice