Open Question: Havent had my period for like 10 months? Whats happening?!?

Ive had my period for like a few years, last summer I went on a diet, I lost a stone and a half (i think ive gained that half now though haha) and i ealised i didnt have my period for a while, it was a bit irregular ANYWAY. but now its been 10 months. i know diets can affect it but i stopped in january which was AGES ago. Im not even underweight, I dont want to see my doctor thats just embarassing!