My period was July 15th and I should have started yesterday but instead I had a light period last week. My breast have been very sore, I've been moody, nauseous, cramping, headache and backaches. I took a pregnancy test yesterday and this morning both were negative.

I had a miscarriage last year at 6 weeks and 6 days and I was 2 days late before I got a positive test.

Is it possible I may be pregnant?