What Causes Vaginal Watery Fluid Leakage?

Hi I just wanted to ask about this watery fluid that is leaking from me? September 17-20th I had my period. I had sex with my husband the 13-16th and didnt have my period the remainder of the month. I then had sex with my husband the 10th-13th sometimes with a condom. I hit my period the 22-27 and also had sex with my husband the 23-27 sometimes again without a condom. I have had headaches for two weeks straight now and was sick to my stomach all last week. Now I have this watery fluid leaking from me? I was just wondering if you knew what was happening? Thank you so much in advance.