Got some LELO kegel balls... can't get them in.

Hi everyone. So I'd been hearing some great reviews on LELO kegel balls and how intense they make your orgasms, and decided to try them out. I never really do kegels because I just forget about them and don't ever feel like doing them when I'm sitting around, so I thought it'd be a good idea to get these since there's pretty much no thought process put into it and they work out your kegels just while doing everyday activities.

They came in the mail earlier this week, and today I laid down to try them out.... problem is, I can't get them in. I tried turning myself on, watched some porn, tried it then. Still no luck. I thought maybe orgasming would help my muscles relax some more, so I orgasmed, tried right after, still no luck only I got them in a little further than before. I can get like MAYBE half of it in but I can feel my vagina's just pushing against it and it hurts (not unbearably, but enough to make me stop).

Some info about me: 19f, not a virgin although it's been over a year since I've had sex. My SO lives in another country, and I'm moving over there next year (also I thought maybe it'd be a nice little surprise for him when I get there, having my pelvic floor all toned up and ready to use). He is bigger in width than the width of the LELO balls and I had no problem getting him in me when we had sex over a year ago. When I masturbate I generally just stimulate my clit and sometimes finger myself with one finger. Sometimes I'll do more than one, but it's rare.

Any other information you need to know, ask me. I'm getting kind of frustrated by it, and it's worrying me a little since I've heard of things like vaginismus and stuff... So does anyone have any suggestions? Has anyone else had this problem with the LELO balls? What did you do to solve it?

Edit: Some people are suggesting lube. I was definitely more than wet enough considering the first time I was very worked up, and the second time (after I'd orgasmed) I was even moreso. So lube would've been pointless.