Diva cup never wanting to pop open!! Thinking of getting a new cup.

Hello, im quite new to live journal, even though ive been reading the forums for forever.

Here's some info on me: im only 15, still a virgin, hymen fully broken, and ive been using my (small) diva cup (stem cut completely off, the grip rings really irritated me) on and off for about a year. I have a very heavy flow (on heavy days, i have to change a super tampon every hour, and my cup every 3-4 hours, if not it will over flow). Im on the pill, so my flow lasts exactly 4-5 days. And i am not a small girl. I'm about  5'4', 200 pounds (doctor says im very healthy, i just have a low metabolism and i have a naturally large body frame)

I love using my diva cup, on days it want to open. Its either hit or miss when i go to insert it. I'll spend half an hour in the bathroom reinserting it and fiddling with it with it, and it still will not pop open. I've tried absolutly everything, every fold, every position, even tried different times of the day to see if that would make a difference. Nothing will get this darn thing to pop open. The reason i choose the diva cup is for 1). it was cheap and easy to get a hold of 2). I wouldn't say im long "down there" but im not short either, i have no idea where my cervix is, i guess it pretty far up there. And 3). The capacity. The diva cup fits me really awkwardly. One day, it will crawl all the way up there to where i have to push down to reach it, and another day its right at the entrence. The days its at the entrence, it pushes on my bladder pretty bad. I just get fed up half the time and just use a tampon. Which i hate because both pads and tampons make me itch and cause irritation. Which back to the popping open issues. The "c" fold is the only fold that even might open. And it will get half open ( like an straight up and down, as if you smushed it, if that makes sense) and make the suction already. I tried pushing on the cup, and pushing on the walls of my vagina, which kinda works sometimes, but i guess my muscles down there are very very strong. With both the cup half way open and my finger up there, it feels like something is squezing on my finger, and thats when my muscles are relaxed. If i tense up, it kinda hurts my finger and smoshes the whole cup. So when i try to push on the walls of my vagina, it doesnt wanna move, at all. I honestly just think the diva cup is just too big for me, both length wise, and volume wise. 


  I'm a cheap a$$, and i dont wanna buy a new cup. But it seems im gonna have too. Im thinking about a keeper moon cup, due to its easy to get a hold of on amazon and what not. Its both shorter and longer at the same time due the stem. A good piece of mind in case it crawls up there. And its firmer, so i hear. Or a meluna medium (the sport one really catches my eye, since it seems my muscles are very strong). I already know there isnt most likely going to be a small cup with the capacity of the diva, but im willing to make the sacrifice. I really don't wanna spend more than $30 on a new cup. Let me know what you guys think! :)