Very painful cramping &a light spotting

Amanda
Ok guys I have a question. I am 6 weeks and 6 days pregnant. I have been having some painful constant cramping for the past few weeks but the past couple days I have had such bad cramps that they wake me up in the middle of the night, like almost terrible period cramps. The cramps on a scale of 1-10 are a good 7. 
Now just today I've noticed some light spotting. 
Should I be worried? This is my 2nd pregnancy and my doctors appointment isn't for another 2 weeks :(