Diastasis Recti

Please help!! I noticed a slight separation between my abdominal muscles this weekend, when I pressed on my belly button. I have heard this gets worse? I am only at 14 weeks. Did this happen to you all? If so, when? If not, should I be doing specific ab exercises to prevent this? I have started on a massive exercise regimen now, because I read that this can persist to being up to two fingers in width??? HELP!!!