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The ligaments that support the uterus will stretch and with this stretching may cause mild cramps. 3. Miscarriage-Cramping during early pregnancy, especially accompanied by spotting or bleeding, is a warning sign of a possible miscarriage.
But I know it is very common in early pregnancy to have period-like cramps. As long as you're not in a lot of pain and there is no bleeding, like you mentioned, it really is nothing to worry about. I had the cramping for a few weeks in very early pregnancy.