Eye twitches/spasms usually mean your eyes are tired - not necessarily that you are tired. Do you spend a lot time on the computer, or doing meticulous eye/hand coordination type crafts or projects, or reading, or reading in bad light, or computer in bad lighting...Get the picture? If so, take a break for a day or two if you can and/or change the location so you're in more natural lighting and be sure to take lots of breaks - even if that break means looking up from your task and staring longingly outside and then closing your eyes for a few seconds. Hopefully, these types of mini breaks (with lots of deep breaths and reflective moments) will help with your stress too.
Best of luck,
S.