Exercise when ttc and in 2ww

I'm in my first 2ww...not getting too hopeful but I guess you just never know. Anyway, I try and go to the gym at least three times a week, more if I can, especially as I've put on quite a bit of weight since my wedding last summer. Since ttc I've stopped using the power plate but carried on running, using the cross trainer and the bike. I just wondered what other people's thoughts are on doing the same level of exercise when you're ttc, especially in the 2ww. My friend wants me to do a spinning class with her in the morning and I was thinking this should be ok - but I don't want to do anything that might stop a potential bean from being sticky if you know what I mean?! ? Any thoughts?? xx