You will get back in to it in no time! I remember when I ask my doctor about running when I was pregnant, he said "You will know when to stop (usually around 7 months)" I think it's great that you did any activity at all!!! Have you looked at any prenatal Yoga or Pilates? That will be my exercise of choice with baby #2! I've started doing yoga the past few months, and just fallen in love with it!
Yoga is on the list! I was obsessed when I lived in DC, and I found a great little studio at 91st & Memorial when I moved to Tulsa. BUT it's SO expensive, so I will be doing it at home.