Menstrual Cups: HELP!!!

Okay, so this would be my second time using the Diva Cup. Last month it was a struggle, but I got use to using it & figured this month I should be a semi pro, but it's like worse. I don't know how to insert & position it properly. I'm relaxed when I insert it & I GUESS it's completely open when it's inside. Sometimes I struggle getting it in I guess it's because my nails are kinda long lol idk, but I hurt myself inserting it, it tends to pop open before I get it in...also earlier I danced a little & the suction broke & blood began to drip, so I'm like wtf! I have a party to go to tonight & I prefer to use the cup because I really don't want to wear a pad 🙁 should I just use a tampon & pad instead?? I really don't like to use tampons, they make me feel bloated 😕