[Coffee.]

one - my period should have started today, its last about three days, and im going to the pool on wednesday for my dads birthday so i cant just skip it. im not even spotting at all, is there anything i can do to get it by tomorrow?
Are you on the pill? That'll help me be able to answer that question. If you're not, then there really is no way to induce your period. It's kind of just random. If you are, I'd honestly tell you to skip it for right now if you have next months pills and just take some until Wednesday, then just have your period after then.

problem two ties into my first one, i cant use tampons! i dont bleed much, ive never filled a pad or anything, and i put in a tampon (for light slow, tiny little thing) and im fairly sure i did it right but it was so uncomfortable it hurt to walk! is there any way to change that?
One problem you may be having is that you don't bleed enough. Tampons are much more comfortable with blood kind of as a lubricant (that sounds really gross, but is kinda true.) They're easier to put in with a more regular/heavier flow. If you're not bleeding much, they can be quite uncomfortable. I might recommend getting a smaller tampon if your period ends up coming, maybe one made for teenagers or for very light flows. I have to get thinner ones because my vaginal walls are quite tight. If I don't, they're uncomfortable.

Hope that helps! I hope it comes and leaves before pool time and you are able to go swimming, or you're able to find a tampon brand you're comfortable with. Good luck!