Hi and welcome to the Chiari forum.
As wonderchiari mentioned above Chiari symptoms do cycle.....so it is possible to have good days followed by bad....especially if we over do it on our good days.
Until u have more testing there is no way to know how this may affect ur chosen career path...
U will want testing to determine if u have a CSF obstruction, Syringomyelia,tethered cord,ICP,POTS, sleep apnea and ehlers-danlos.
There is a list of activities to avoid to help keep symptoms at bay in the Health Pages......u can also journal what u do that u have a flare up so u also know how ur own body reacts....but use the list as a guide.
http://www.medhelp.org/health_pages/list?cid=186