Like yourself I run or I did run a 7.5 min mile, but I am now 35 weeks and I have not been able to run since my 12th week, had to give up running because I have getting sharpe pains in my groin and a funny wobbly feeling in my tum and if all my bits where slushing around, so I have been walking ever since. So don't be to sad if you can't keep the running, but if you can still run go for it and enjoy for as long as you can! We are all different so just listen to your body. I am lucky because the club I'm with Cardiff Hash House Harriers set a trail and I do a short cut, so I am still able to take part.
Me 2 I'm a 34F, and need really, really good support, and I wear Shock Absorber B109, really comfortably, no more rubbing, boobs don't bonce anyone - hurrah!!! Got mine from Debenhams and they had plenty in my size.