Anxiety/stressing during 2WW

We have been trying to concieve for 2 years. We have had all the fertility test done and everything is normal. 
​Whenever I go into the 2WW my brain goes into over drive!! I keep telling myself to relax and not to think about it but it's so HARD!!  Even when I'm keeping busy or out socialising it remains constantly at the back of my mind. I know it is because we want a baby so desperately and after all this time we're starting to get inpatient!! I am concerned that this constant over thinking is preventing my from concieving. 
​I keep healthy in that I eat well, take my vitamins, stay away from my favourite thing -  wine, the only thing I don't do much of is exercise. My BMI is 20. 
​Does anyone else have this issue? What do you do to stop stressing apart from the obvious of keeping busy? If you have recently been lucky enough to get your BFP was there anything differently you did that month  that you think helped you conceive? Any advice would be gratefully appreciated. Wishing you all the best of luck!! X