all excercise is perfectly fine while ttc, and most is fine while pregnant unless you are told otherwise (if you have cervical issues, are bleeding, blood pressure etc). the benefits of exercise are just so great on the body. when you exercise it gets your blood flowing better, including the blood to your uterus, making it better, stronger and healthier. plus it keeps you at a healthy weight, balances hormone leves and just makes you feel good! so exercising while ttc can boost your chances! i think you should go back to what you were doing before ttc.
work it girl!