In the current scenario, the possibilities are some cervical or vaginal infection
, erosion, polyp or just a breakthrough precipitated by intercourse. The clumpy discharge needs to be examined clinically. I would ask you to get a proper clinical evaluation by a specialist and if needed, get a cervical and vaginal swab. If infection is the cause, appropriate treatment helps to relieve the spotting. please do not douche or use strong soap solutions. Use sanitary pads instead of tampons. Hope this helps.