IVF advice pls!

Kelly • Ttc for 3 years for baby #1 now going through ivf
I have my first consultation on Wednesday and I am a little worried as my BMI is slightly over. 
​I'm guessing I won't start the injections until after my next period, due 3rd April. 
​Anyone have any suggestions to help me keep calm? Any sugesstions on exercise? At the moment I do swimming and spinning. Should I stop these or carry on? 
​Any advice would be great!