Thanks for the query.
Usually vaginal discharge
increases before periods, if there is no associated features like foul smell, itching, pain abdomen etc. no need to bother about it.
The bleeding you had after intercourse could be due to causes like:
-cervical erosion, polyp etc.
-increased blood supply to local organs due to endometriosis
So you once consult gynecologist and get examined to find out the possible cause and take treatment accordingly.
Check for hemoglobin
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429