Charting is awesome! Really helpful to tell when you ovulate.
I agree with moter98, it is saving my sanity and definitely not causing more stress- I know when AF will start within a day or two, if BD was well-timed, etc. As long as you don't fall into the trap of over-analyzing every little change in temperature, and just look at trends, it is useful.
From what I have read, you can temp while using an electric blanket as long as it stays the same every day (ie use it at the same setting for your whole cycle). This way, if it changes your temps, it will change them by the same amount for the whole month and the trend will be the same, IYKWIM?
Sorry about your MC, I went through one late last year and it sucks! Charting during/afterwords let me know when hormones were back to normal and when the first ov occured.
FertilityFriend is great.