I've been a tampon user forever pretty much, and I want to try a cup. The older I get, the heavier my flow is getting it seems. I have never tried a cup but am seriously considering it. Probably TMI but I'm not exactly tight down there....When my flow starts getting heavy I have a hard time holding a super plus or ultra in there--they fill up in like an hour and slip down and fall out if I'm not careful.... and YES I'm putting them in right. I feel like I need a pretty firm cup with good capacity. And my cervix is really high too. Any recommendations? I don't care about comfort as long as I'm not leaking and dealing with slipping tampons! TIA!!!