caplorunin

I'm trying to get a transmutation tablet, but for that I need a philosipher's stone, which means glowstone is required. So here's the deal, when I walk into my portal and stand in it, it just makes my screen go all wavey as if i'm entering the nether, but it stops just before it allows me to enter. I did search for a thread similar to this before posting, so sorry if I somehow missed it. I'd very much appreciate a bit of assistance. Thanks, -Caplorunin