Victoria's Secret bathing suit bottoms sizing help please!!?

I am a size 4 in american eagle and it's a little big, but the 2 is a little snug, but american eagle jeans are usually made big. In Aeropostale jeans I'm a 5/6 and they're a little big, but the 3/4 is too snug. In Victoria's Secret Pink underwear I buy a medium, but they're a little tiny bit big. I also heard that the Pink line runs small. I don't own regular VS underwear, so I can't compare. So my question is about Victoria's Secret bathingsuits being true to size. Not the VS Pink, just the regular ones. The measurements are exactly the same as american eagle and it's saying I should be a small. I have hips, but a regular sized . I'm ordering the scoop bottoms which are a little bigger anyway. My hip measurement is like a 36-37. The small on Victoria's Secret in bathingsuits is 36.75-37.75. Is anyone else about my size wearing a small? I don't want a saggy , and when you get in the water your bottoms always get baggier. What I'm really worried about is how low they will be. I'm ordering the scoop bottoms so that it doesn't show the top of my lady parts, and I'm afraid the small will be too low, but if they're true to measurements then I'm a small. I want it to go close to my belly on like the description says it will, and I don't want a small to mess that up. I just want to make sure I shouldn't order a medium. I was reading online and some were saying the bottoms ran big and others were saying they ran small. As I said I get a medium in their underwear, but I could wear a small, plus it's Pink, I just like a bit more coverage, but for a bathing suit I want it to fit perfect. Especially for $28 a pair. The measurements say small..Help. :(