What is going on with my body?!

So this post may be TMI. We've been trying for over a year with no success so we decided to take a break for a bit. Below I've posted what my calendar looks like right now. On the 9th through the 14th I had brown spotting that would come and go. Since I've been tracking my cycles I've not had AF come a week early. Maybe a couple of times it was one day early but that's it. I've got lower back pain like crazy and constipation. This morning I woke up and thought for sure AF had came because I had a wet feeling. Nope just a ton of CM. I tested on tuesday BFN. I guess I'm just anxious about getting another BFN but also concerned what is going on. I dont have typical symptoms that i once read about and symptom spotted for. Def no sore boobs.