Not Sure What To Do

[oakie001]

I am TTC and today is CD21 and last night I had brown discharge when I wipped and a lot of on and off cramping. Yesterday I was running to the restroom a lot more then normal. The strange thing is I use the CBFM and this whole month has been at 2 level or just peak. I have not had a high peak. I am 40 years old, in the two year had a miscarriage and etopic where I lost one tube. My cycles are usally 31 days. Can anyone help me or give me advice? We are trying for our second child. I am also a gastric bypass patient with liver issues.