Hey PatientMum, so sorry to hear your struggle. Infertility is pretty damn hard, my heart breaks for everyone else who is going through it.
I can only speak for myself regarding your question. During my 2WWs, I was often anxious and nervous, thinking about it all the time, which in turn made me stressed and angry with myself. Like you, I thought all the stress that I was creating would hurt my chances, and this made me really hopeless and furious. So no, I cannot say that I was calm and happy during my 2WW for this pregnancy (it was a FET), but I think at some point I accepted that the result was out of my control either way and didn`t get angry with myself for being nervous, but instead accepted that it was only natural to be nervous.
Im sorry if it wasnt helpful, but please be gentle with yourself no matter what. I do believe in positive thinking and all the good things it can bring
Hugs xxxx