If you're only spotting you can probably get around it without using sponges, if you don't have any! Take a bath (not shower) and immediately put a tampon in afterwards, tucking the string up inside you. Keep it in as long as you are having foreplay/ not having a willy or fingers inside you. Once it's going that way, make an excuse and nip to the bathroom to pull the tampon out..... you'll then get away with 20 minutes or so of oral on you or sex with no blood. Maybe use red condoms, and don't take any massively long bookings? Good luck as it would be a shame to have to give up on tour x