Very light spotting after intercourse and between periods. last pap was year ago and normal?

May be infection: Infection makes tissue more irritated and likely to bleed lightly. You should see a gynecologist to check for infection. Extremely rare to get cancer within one year of normal pap. Also rarely more serious problems but most likely infection

Irregular bleeding: Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections ; hormonal changes can cause spotting. If there is a concern for pregnancy then do a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.