Yikes! I don't know if I agree with your doctor. But I don't know all the details involved with your life. And IMHO, keeping that nursing should make you feel better, not worse.
Yes, weaning can be a truly emotional process, whether the mom is ready for it or not. It does cause huge hormonal changes. You are missing the prolactin (happy hormone surges). IF you decide to completely wean, there are some things you can try to make yourself feel better. Exercise, eating well, drinking plenty of fluids, and napping if you can, those are all great for your body and will whip those hormones back into shape. Sunshine and a 30 min walk can sometimes turn my day around. What have you done for yourself lately? (Are you PMS-ing or could you be pregnant? - those both are different, and could cause these feelings, after you have a baby)
BUT nothing else is saying you have to wean. LLL says that babies don't self wean before a year old, and I believe it. 8 months is a very typical age for a baby to become less interested in nursing for a while. And if a mother, unwillingly or unknowingly, gives a bottle during this time it encourages the baby to "wean". Her supply decreases, baby is going through the independent stage, and too many moms and babies wean around 8-9 months. :cry:
I agree, getting to 8 months is absolutely fantastic! Yes, what you are feeling about potential weaning is totally normal. (When I weaned dd I was sad for almost 2 weeks, but slowly started feeling better - and that was mutual weaning) If you want to work on anything (like getting back nursings), or keep that last feed as long as you want - then go ahead!!! You know you and your baby better than any of us or your doctor.
{hugs} and I hope you're feeling better soon...