Hello there! I am a doula (sort of like a midwife, but not).
Cramping CAN be normal, it can also be abnormal. This is what I would do - drink a TON of water - we're talking a gallon here - seriously. Drink, drink, drink!!!
If the cramping continues, call the doctor and tell them that you have an appointment scheduled for next week, but you're experiencing cramping and would like to be seen today (tomorrow).
IF, however, you start bleeding - go to the ER. No joke. I know we're supposed to talk you out of going to the ER on this forum, but if you have bleeding or even severe cramping, go to the ER. Better safe then sorry.
Let me know if you have any more questions as I'd love to be a resource for you!!!