Should I go up or give up?

So I’ve been using menstrual cups on and off for about five years now. I hardly ever wear one because of difficulty getting it to stay in and comfortable. When I do get it in, it slips down while doing normal activities like walking, sitting, 💩, etc.

I have a size one in both the DivaCup & Eva Cup. I’ve trimmed the stem on both due to the stem irritating me when they slip down, however, that was not much help since they still slip down and irritate me. I’m under 30 & I’ve never had a kid, but should I try a bigger size or just stop trying to use them all together?