I can never find the right bra! Help?!?

I didnt see that bra available in your size...maybe a 36C would be a better fit for you as a 38C the cup may be too large and thus would reduce the push up effect. A 36C is the same cup size as a 38B but the back willbe a little smaller/tighter. I would try on alot of bras in the store until I got the result I was looking for...and then wiggle and bend and jump around to see if my fell out of the bra etc...then if it ped my tests I would then buy it!...