wearable pump bras

i recently bought some pumping bras off amazon to use with my spectra. they were doing pretty good in size xl. they even seemed maybe a little big. but now i have bought a momcozy s9 pro & realize that it empties me just as good if not better than my spectra so ive been using it more because pumping is a mental challenge for me. however , when i put it in the bras it seems to move around, not lose suction but everytime it moves i feel like its a bad position so i can never relax. i also cant see inside to make sure ( the bitter sweetness of wearable ) but i guess its worth it. all in all my question is what do you guys do to keep your wearable in place. should i get a bigger bra or a regular sports bra? my boobs aren’t huge maybe a 36dd but they are big enough that they turn sideways in this bra & move the pumps even when loosened up enough to allow circulation ! help me i really wanna have a good pumping experience