7mths post-partum, no birth control, irregular/extremely light period, pink tinged blood, no cramping(which is rare for me). could i be pregnant again?

Yes: If you are 7 months postpartum and not using contraception you are at risk for pregnancy. Irregular, light bleeding can be a sign. A pregnancy test is recommended. If it is positive you should see your health care provider to ensure this is a normal pregnancy. Light bleeding in the first trimester could be normal early pregnancy, threatened miscarriage or tubal pregnancy.