Sobering up

Having children changes the way you are drastically. I never once thought about becoming a dad. Until the day i met my beautiful fiancée. I used to party, drugs, alcohol, all the wonderful things that usually end in disaster, but that changed the day i met her. We are now trying for the third time to conceive, and ive cut myself off completely from any and every harmful thing to my health. She ovulated this past weekend, and im kind of new to the whole pregnancy thing with women, like, i dont know what to look for, for signs of her being pregnant, or what necessarily happens if we were successful in out attempts. If theres any mothers out there currently that could give me some tips, or some facts, thatd be amazingly appreciated. Thanks!