can't stop gaining weight... suggestions please

Hey guys, I'm gaining too much weight!! What can I do to slow the weight gain down?? I already walk for an hour every day & try to eat healthy though😫 I don't eat many carbs at all! I eat oats with honey for breakfast, fruit, yougurt & vita-weets, cruskets with avacado a lot for lunch with a "healthy" tea stirfry or meat sweet patato with veg etc... & I only drink water/healthy orange juice! I have gained like over a kg each week the last few weeks!!! I've only just gone 24 weeks. I have almost gained my limit that the hospital gave me for the entire pregnancy & I have the last 16 weeks to go still😳