Hi thanks for your question.
The commonest cause of vaginal discharge
along with painful intercourse is fungal infection
of vaginal .The pain lower abdomen during intercourse could also be due to involvement of cervix
by infection.There is nothing to be afraid of.You can discuss the issue with your partener.It is 100% curable disease,nothing to worry.Consult nearby gynaecologist who may prescrible you drug for local use as well as for oral use and you will be fine in 3 to 4 days.
Hope this answers your question.