Prego Swimwear Maternity Dot Tankini Set

I ordered the XL. The bottoms won't stay on. My hips are currently 44.4". I had to tie the sides passed the actual tie area and onto the actual swimsuit area quite far. Don't know if I will be able to swim in the bottoms without losing them. The top is cute. It flows around belly not hugs and I have room to grow. I am typically a 38 DD but little larger now pregnant and my pregnant belly is 45". The XL top will work but I believe i could've used the L in the top and M in bottoms. I would return for L but L is out of stock. I will keep XL cause it is a cute suit and cross my fingers I don't lose my bottoms.