Driving me crazy!!!!

So I never miss my period, always right on schedule and this time I went 35 days without a period. That's an extremely long time for me. Wednesday after I got home from work, she showed up, and once again abnormal for me. What throws me off even more is later that night probably around 1 or 2 am. My period was gone and there's been no more. By SO and I have been trying to conceive and I'm worried what this may be.