16 weeks pregnant

Hi all in 16vweeks pregnant. Past 2 weeks my weight has been constant. Pre pregnancy inward 63 kg. And at 13 to 14 weeks I was 66kg. Now past 2 weeks plus I am se 66 kg. I have bladder issues and a previous pregnancy whicj resulted in termination. So very worried. I don't take any special diet for pregnancy ( I mean very nutritious, since i have bladder flares with many foods )

I'm on a very simple diet. Worried if weight being constant at this stage. Will my baby be ok. Growth and all.