Period dillema...?

I was supposed to start my length today, but I didn't. It's not unusual for me to start my period 1 or 2 days past due, so no worries there.
The item is I'm planning on going to a pool party tomorrow. Since my spell hasn't started, I can't start using tampons - it hurts like hell to nick out when there's no blood. But as you would expect I don't want my period to start while I'm within the pool (I don't know if it'll start tomorrow or the day after that).
Is here any other option i hold? Or do I just hold to stay out of the water tomorrow?
Answers:

What is PCOS and what are the symptoms of it?

You could try using a tampon that's for oil lamp days. Its that pearl brand or whatever. Those tampons are skinnier so it won't hurt as much to transport it out than it would with a regular sized tampon. Or you could merely keep getting out of the pool to jump check.

How can i get well-timed period? are there any pills?

You will be capable of insert a tampon if you use some lubricant - KY jelly or similar.