I been having cramps like periods cramps but it's not time for my period. I have been having backaches. I have been moody for a week now. My Leg have been cramping. I don't have a appetite like I used too. I never been pregnant before and I don't know the early sign of pregnancy.

What would give you a reason for pregnancy? Unprotected sex?

While some of what you are experiencing can sometimes be due to pregnancy, not all are usually associated with early pregnancy. There are a number of reasons you might be have stomach cramps for example. Sometimes symptoms of PMS can start a week or so before a period is expected... when are you due for a period? Some women will have some cramping/backache midcycle or around ovulation even if you don't have it every cycle. Leg cramps can be caused by low potassium, magnesium, and calcium... or simply from being a bit dehydrated, for example.

If you have missed a period, you could try a pregnancy test. If you haven't missed a period, wait and see what happens when you would expect your next one.