????? Im really confused

So we had sex on Sunday without condom since we're trying but this is like are 10th time trying and I haven't got pregnant yet... Monday morning i was really nauseous, just wanted to sleep, and I got sick, but on Tuesday I started bleeding so im super confused, but my boyfriend and my pregnant best friend are 100% positive that im pregnant.. Since yesterday I've been eating and eating and I don't normally have a big appetite. I have no idea whats going on.