thanks for your query.
Wihout any itching, pain, burning or other problem, please do not worry about there being any disease.
Normally, during the course of a menstrual cycle, specially around the time of ovulation ( mid cycle ) and after it, there is vaginal discharge, which is also sometimes in the form of mucus plugs or clumps, as you described
This is perfectly normal, and nothing to worry about.
However, do not use any medications or products without consultation.
To rule out any associated pelvic infections, and to confirm that this is indeed physiological vaginal discharge
, please consult your gynecologist.