Backstory: I'm 19 years old, and I'm not a virgin. After feeling around a lot during my cycle, I realized that my cervix is around 45-50 mm high. I also think it might be long (my cervix, that is), but I'm not certain. My flow is such that on my heaviest day, I change pads every 4 hours or so, and on my lightest days, I can use a pad for 8 hours or more with hardly anything on it.
In the mean time, I bought a box of Insteads today (I'm pretty sure it's the old style, not the newer kind), and I'm really liking the idea of using a cup so far. It was a little awkward to put in at first, but there was no leakage except when I peed (which is normal, apparently). There was a problem however: when I did pee, I had the feeling like I didn't empty my bladder all the way. And no matter how much I tried, I couldn't empty it with the Softcup in. I guess with a reusable cup, I could just push it up, but Softcups don't push up like that, right? So I'm maybe leaning towards a softer reusable cup since I'm having that pee problem. Of course I could always just take the cup out when I pee, but that seems like a hassle. Especially because I tend to drink a lot of water at work and have to pee four or five times in my 8 hour workday. And the point of the cup is to avoid a hassle right?
Also, the Softcup JUST BARELY fits behind my pelvic bone, which is supposed to secure it. Obviously it was secure enough to stay in for the 4 or so hours I had it in today, but at one point, I think it got a little loose because I was able to feel it a lot. I Kegeled it back up, though, and it was fine. Does this mean my vagina is narrow? Should I consider a cup with a smaller diameter? Maybe 41-43 mm?
So what does everyone think? Any and all advice is appreciated. I'm really trying to decide which cup is best for me since I'm a college student and don't have a lot of money to try a bunch of different cups. I was leaning towards the small Diva last cycle (I was really feeling it for some reason), but I'm worried it will be too long. I'm also not 100% into Melunas because you can't leave them out in the sun, which is apparently something a lot of you do. So that's all my info, hopefully you have some advice for me. Thanks in advance for your help!