Low Blood Presure

I woke up shortly ago when they came into take my vitals and my blood pressure is really low.  103/46  I always hear about high blood pressure as being bad, but I don't really know about low blood pressure.  I guess I will google it now and then try going back to sleep. My head and ear really hurt right now too even though they are giving me 15mg of oxycodone and (I don't know how many mg) Tylenol!  :(