Limbs aching

me, I'm 16 weeks and i always get this when i eat too salty. usually I will get out of bed cause aching so bad.. then have to walk up and down for about 5 mins, while rotating my wrists, Doing shoulder swings (like how the swimmers do it), rotate my ankles, I also kick back my legs like so my foot is trying to hit my bumb.. and I drink a glass of water. it always works and I can go back to sleep without aching. I also tried Magnesium but it only helps with cramps in my calf and not the aching pain.

i tried propping my feet on pillow... soaking in warm bath may help muscles relax too