Could I be Pregnant? Help!!!!!

Jakayla
Last month on April 3rd I was sexually active, he sort of put his penis in me, but didn't quite get it in. He didn't ejaculate, but I'm worried about the pre- ejaculation. On April 11th I ended up getting my period & it was completely normal. Now it's May & I'm due for my period soon, should I be worried about being pregnant? I have a bit of tail bone pain & some sort of whitish/yellowish discharge down there! Help!