Hi S'rose and welcome.

Bec, welcome to you as well. Keep going with the weight loss. If the 15kg loss is just to get below BMI 35 then keep going for as long as possible as the closer you get to the healthy BMI range, the more it will change your life, and not just in regards to pregnancy.

If you get sick of the gym, don't forget that you can very effectively lose weight just by walking out your front door and going for a fast walk or slow jog, or whatever it is that gets your heart rate up above 60-70% of its capacity for more than 30 minutes. That, combined with making sure your energy intake is less than your energy output (ie you burn your food energy first, then your body turns to fat stores) means that you can lose weight fairly quickly and easily. Don't let people discourage you. Weight loss is actually a damn sight easier than many people would have you believe, if you do it right. Good on you for having a go.