I'm 25 and I've only recently become sexually active. Before then, I never used tampons because even trying to insert them was complete agony (I'm pretty sure I may suffer from vaginismus). Now that I've actually started using tampons, I've realized how uneconomical they are. I don't normally have a super heavy flow, so I can wear a pad for much longer than is recommended to wear a tampon. Furthermore, since I'm still a newbie when it comes to inserting tampons, there's a lot of trial and error which tends to result in wasted tampons. Therefore, I've been looking into the MUCH more cost-effective alternative of the menstrual cup.
However, since a menstrual cup IS a fairly large investment, I want to make sure I get the right one. I'd hate to drop $40+ on something that isn't the right fit for me. Since my flow isn't particularly heavy and I'm a 25-year-old who has never had children, I don't think I would need a very large cup. I felt around and I THINK my cervix is about 3-4 cm in, but I'm not completely sure because to be honest, I have no idea what exactly the cervix feels like.
I could get a DivaCup at the pharmacy, but like I said, it's $40, so I'm reluctant to buy one unless I think it would be my best bet. From what I've heard, DivaCups are the biggest out there, and I'm wondering if I should go for something else instead. I'd love some advice because I'm so new to all of this and I really do not want to essentially throw away money on the wrong choice.
Anyway, thanks in advance for any input. :)