I do not do BBT. Mainly because when we started TTC I was working 3rd shift. When I got home I would take a small nap and then another before work the next night. I rarely got 3-4 hours at a time. Now my sleep schedule is all messed up. I'll sleep for an hour, then up, another 2 hours, then up. My temps would be all over the place.
I just use opks, and cm signs.
In the past I used cough syrup for my cm and it worked.
Also, the ewcm had some brown spotting. I am assuming it is either O spotting or maybe irritation.