The thought of being away from my son makes me physically ill

My son is 1 and a half and the most I've been away from him was to go and take a shower. The thought of me going to work again or him going to school makes me feel like I cant breathe and I instantly get sick to my stomach. Is it going to get any easier? Do I need therapy or does everyone feel this way? I dont have to go back to work yet but even thinking about it makes me want to vomit. I love my son so much I dont ever want to leave him.