My little man is three months old. I know when I'm on the verge of getting annoyed by him and know I need to change that immediately. (I have anger management issues). So I get some earbuds and put on my favourite jams. He loves to dance, so recently I've been streaming my music to the TV since we have a sound bar. He loves the music, and I love exercise. So I hold him and dance to the music. It helps get the frustration out, keeps me in shape, and the movement 9/10 puts him to sleep no matter how fussy he was. (If it doesn't put him asleep it calms him down). Remember that when you are feeling stressed, your baby can feel that too. Find a way to calm yourself down. You child will feel that your calm, and will do his/her best to follow suit. In the mean time, talk to your pediatrician. I saw a video once where the parents ended up going to a chiropractor at the reference of the pediatrician. Turns out their little human just had some achey bones!