Confused??

Kandy • 43 year old TTC... Keeping the Faith!
So I had my period on 9/29, and a positive ovulation on 10/7....two days later I started cramping off and on., my breast are really sore and I'm starting to feel nauseous....pregnancy doesn't happens this fast! ....how fast can someone get pregnant? Does it happen that quick? Please help...I'm confused!