Jessica I think you should start charting again, so you can be sure of whether or not you are ovulating. As for your nurser, I started 'don't offer, don't refuse' about when DS turned 2; he used to nurse to bed, to nap and frequently throughout the day/night. Now, at 3, he only nurses to bed; sometimes he asks mid-day (when he used to take his nap, which he dropped at 2.5), but I tell him he can only have booby if we lay down in his bed.
2 years is also when we started encouraging him to sleep in his own bed. I would lay down to nurse him to sleep in his own room and return to lay down with him whenever he cried for me, leaving once he fell asleep...eventually he started staying a sleep for longer periods of time. Now, he goes down at about 8pm and comes in to our bed on his own at about 6am and sleeps for another hour or more (I get up at 7am, so sometimes he gets up with me and sometimes he sleeps through to 8 or 9)
HTH & GL!