Been have on and off again migraines for the past 2 days with pressure on left side with stiffness in the neck no other symptoms, should i be worried?

Not worried: Do you have migraines periodically and does this seem like a "typical" migraine for you? Try taking some Excederin Migraine and consider a massage to loosen up the muscles in your neck. If you have any sinus symptoms such as fever, cough, nasal drainage or stuffiness, then you may have a sinus infection and should see your doctor or urgent care.