definitely increase it. You've got the right idea about gaining by starvation mode. We aren't made to live a 1200 calorie diet forever. I've posted that the 1200 calorie diet is for someone who is 4'2" and 80lbs (and that is to maintain). I can probably say almost everyone here isn't that height and weight. Otherwise, you'll be right back to where you started, yo-yo dieting. You lose, you gain a lot. You lose a little, you gain a whole lot more! you have to take risk to go higher in calories, until you really understand the science of why and how it works. But here's a website that, once again, I've shared with others here about people stopping the 1200 calorie diet to eat properly for their body, height/weight/activity level. www.eatmore2weighless.com
Check it out and congratulations on your getting married!!! Marriage rocks...at least mine does! Many blessings to you hon!