Plus Size Pregnant Mamas - Help!!!

Ho
Where did you buy a swimsuit?  I can't find one anywhere and I feel like crying.  I'm normally a size 18/XXL but have put on some baby weight, so maybe closer to a 20.  I'm 22w4d and due at the end of September, so I'm definitely going to need to be able to swim to make it through the summer!  Thank you!!