Should I be concerned ?

I am 20 weeks pregnant and I have been feeling the baby move every day for the last 2-3 weeks. Yesterday I had a fairly bad headache that lasted almost all day, and today it's twice as bad (had to take 2 headache reliefs, drink a pop, tried napping ) nothing has worked. Its almost unbearable..

Well I haven't felt my baby move at all today. I know its too early to be watching kicks, etc but I am concerned with the horrid headache and no movement at all. Any ideas? Should I be concerned? Ftm here..

Thank you in advance.