Jan baby!!

So I need everyone's help!! I have recently lost 45 lbs and now I'm 7weeks preg. I don't want to get overly obsessed with my weight during the pregnancy bc this is my last pregnancy more than likely and I want to enjoy it, how do y'all keep off all the unhealthy weight and the spurts of eating random unhealthy things! I am in nursing school and very active however I want to start working out! Any tips!