Cramps gone?

I'm 6.5 weeks today and I have light intermittent cramps on and off since I have conceived. Yesterday I had pinching nothing bad or anything, but today I haven experienced anything cramps. Is this bad? The only other symptoms I have are that my nipples are sensitive and a little bigger, and I think I'm a little more tired than normal. I don't have any nausea.. It is kind of worrying me! Advise? Opinions??