Im not quite sure whats wrong with me today but im really not feelin well, i feel lerthargic and under the weather. Yesterday i went to bed earlier than usual with a pounding headache, was worst i've had in a long time! Everyday i keep getting these headaches, i went out with some friends yesterday and all day my vision was funny and then a headache came. and just as i was leavin it was getting quite severe! Today im tired, still got a funny head, but not what i'd call a head ache, i feel a bit sick, and my bad is really sore. Also my IBS is playing up and just feel generally rough, im thinking about calling in sick for my shift at work at 5pm, what should i do? and what do u think this could be?