People like Cosabella, Amazon has the curvy in Prime, you'd fit into the large in the Sweetie, it runs large in the band. I think you're prob really in the Extended range but they don't have many of them on there. Never ever pay full price for this thing but there's always some color on discount somewhere. Pullover, adjustable straps. You can get them as low as $20 if you are patient. There's a Plungie version too if you prefer plunge that is supposed to be more supportive but I think the band is firmer so you may need the Extended range for that. You could try the XL if you are worried about size. I wouldn't do the Plungie in the L for example, but the Sweetie is pretty forgiving.

https://www.amazon.com/Cosabella-Womens-Never-Sweetie-Medium/dp/B079VWDRV8

It's basically a fancy nicer materials version of what you've got.

Check the shipping time bc I don't have Prime so was going by the Try Before You Buy filter, they really let you filter the hell out of bralettes, good job Amazon on the sales technique - can choose pull over, non-racerback, etc.

Since it's Try Before You Buy you could get both sizes and return whichever doesn't work. I hear the return label comes in the box which is handy.