What Causes Vaginal Discharges With Delayed Menstruation After Intercourse?

Intercoutse june 24. 2 day period on July 4 when I got off I spotted 2 or 3 weeks non stop from brown to whitish yellowish tint discharge (no infection) stretchy. august 12th period over a week late then came for 3 days had intercourse again day after I came off now watery clear yellowish tint discharge. What is it? Period cycle 30 days