Dr appt tomorrow for unusual cycle...what kinda questions should i ask?

Well my fiance and I have been tryin to conceive for a few months now. Last month my period was 5 days late and was unusually light than like 2 weeks later I had brown spotting like stuff for like 2 days than had some egg white like discharge for like 3 or 4 days and its is now the 29th and my period is again late...I took a pregnancy test a few times through out the first 3 weeks of all this and they were negative so I'm assuming I'm not pregnant. What other questions and concerns should I bring up of possibilities?