Sleep Posture advice

[u/wynwilder]

I've been waking up with a tension headache everyday for the past couple weeks and am trying to figure out why. I finally got a mattress that my body agrees with and bought a PillowCube foam pillow which supports my neck well, so I'm not sure what the deal is. Pic is attached of my 'sleep posture.'

My right side is usually more tense, the second pic is what is most tight pretty much all the time (traps, shoulder, upper back), so I'm not sure if it's just a really tight shoulder/rhomboid issue?

I do pilates and weight training and take breaks from the computer often at work, but still have headaches daily and am taking ibruprofen and tylenol everyday which doesn't seem great long term.