You may be preparing for the early stages of labor. You should call your doctor and alert them to your symptoms. They may want you to be evaluated at Labor and delivery. It does not mean that you will for sure be admitted, but they may want to check your progress, you may be closer than you think.
Good Luck!
I believe your body has a 'clear out' in preperation for labour so keep hydrated and maybe stick to toast and light food just in case it progresses into labour, you dont wanna feel full of food :-)
Good lucm
Could be braxton hicks contractions, or you could be going into labour