I Am Always On Time On My Period Month To

I am always on time on my period month to month every 27 days I get my period. This time I was 8 days late and had my period, which is very unusual to me. I had a miscarriage 5 years ago at 7 weeks pregnant and then had a child a few months after. My breast have been leaking very small drops of clear liquid since yesterday. My pregnancy home test is negative. Any opinions?