Is cramping 2 weeks before your period a sign of pregnancy?

Not usually. It depends on the length of your mentrual cycle, though sometimes its hard to determine how long your cycle lasts esp. if you're young and periods aren't yet regular, but as a general rule cramping 2 weeks before your period simply means you are ovulating. Just before and around Ovulation is the time you are most likely to fall pregnant (roughly 10-16 days after your last period started).