A.C.
When my daughter weaned, I went through ALOT of hormonal changes...hot flashes galore, sweating through everything, erratic periods, and emotional rollercoasters. Just being honest :) This lasted about a month and then I felt regulated. I'm not sure if you're on the progesterone only pill, but if you are now is the time to talk to your doc about changing it. It was the cause of my erratic periods because the lack of breastfeeding was throwing off my hormonal balances. I did ask a question about it at the time so you are free to click my profile and read the thread.
Also, about the closeness, this is when I developed our current night-time routine w/my daughter. When it came to the time in our routine that I would nurse her, I sing her a song and rock her gently instead. We both still get that closeness and comfort before she falls asleep. She is 3 1/2 and this is still part of our nighly ritual that we both love.
Good luck, it would appear from your posts that you are a very dedicated mama...look at this as the next step in your ever-changing relationship with your sweet little man. :)