Pregnancy symptoms or coming off Nuvaring?

So I came off the Nuvaring the beginning of July. I ovulated sometime around July 26 or so and we BD every other day. For about the last week or so my boobs have been SERIOUSLY sore and so have my nipples. My stomach felt tight and weird and I am exhausted. I also had globs of CM coming out of me. Within the last few days my lower back is killing me and I wake up having to pee early early in the morning really bad which never happens. I'm also constantly hungry! Is this from coming off the Nuvaring or am I pregnant??