Def. schedule an appointment with your OBGYN (you should get a pap smear anyway, and you have to get one when you become preggo... might as well get it done beforehand). And discuss TTC methods and why you keep having this.
Sorry and good luck!
Geez...I'm not sure why that would be happening......Is it possible that it was happening before you were TTC and since you started trying you are more in tune with your body and what's going on?? If you are ovulating (according to the OPT's) then that's a good sign.....Can I ask how old you are? We tried for 8 months before I got pregnant, sometimes it just takes longer......Keep working at it ! :o) Do you have a regular OB that you see? If so you may be able to just call the office and see if they have any idea what this may be...Sorry I wasn't more help.