how to put a tampon in without discomfort?

I just tried a tampon earlier today and it was very uncomfortable, I'm pretty sure I put it in correctly, the only thing i might not have done right is ouch the inner tube in all the way because I slightly panicked and tried to do it quickly, but it was all the way in, you could only see the string. But it sorta felt like it was going to fall out. I took it out immediately and that was not a smart idea as it was even more uncomfortable at that point. I pretty much need to wear one for dance tomorrow but I'm scared to try again. Any tips to make it not uncomfortable or feel like it's going to fall out?