10 days late, period of miscarriage?

Gia

My period was 10 days late, I've never been

this late. Since I'm used to being regular I

took a pregnancy test when I was two days

late but it came back negative. The week

before my period I had been feeling very

nauseous specially late at night. Yesterday

which was 10 days late I went to pee and

had very light blood, almost watery after

that nothing and at night I started to feel

very awful, had to lie down because of the

lower back pain and cramps. I told my

boyfriend that I felt weird, I dont know how

to explain it. Today the blood went from

very watery to red. Still have very bad

lower back ache and some abdominal

cramps but they're all over the place not

just on one side. Could this have been a

miscarriage? Thanks for the help