What happens if u dont ovulate and ur periods are lasting 2 days?

i think i have a progesterone deficiency and my periods are only lasting 2 days but are regular. like clockwork. i get super bad PMS and have red up on progesterone deficiency, im worried coz i read it may mean u are not ovulating....will this stop me ever having children??? im 28 and am frightened the menopause is starting early!!