with my past two miscarriages....they were right after eachother i had lower back pain and no spotting with the first miscaariage....go to the doc now
It can be anything, but it doesn't mean you're miscarrying. I was worried too with this pregnancy because I was having back aches and lower abdomen pain, and some women were like "that's not normal, you're probably going to miscarry" so it's not always that. But also like Heather said Mild cramping/period-like cramps are normal. As long as you're not in severe pain or bleeding its always a good sign. Congrats on your pregnancy!
Mild cramping is normal in early pregnancy as your uterus stretches and gets ready for a growing fetus. Good luck to you, and congratulations!