Hi there,
My baby boy is 10 months now and I've suffered with this the whole time! I feel for you, it's just horrible. I get hot and cold sweats, get dizzy and shakey and struggle to talk properly. I asked the doctor about this and she said it is because I'm feeding a big baby! I'm not 100% convinced though.
I have to really make sure I don't go too long without food. If I get bad I have to have something very sugary to make me 'come round' a bit, or ill have a can of full fat coke or something. Probably the wrong thing to do but it makes me feel better fast.
Also, i don't know about you but I have struggled to maintain my weight during breastfeeding and I think I have a fast metabolism too, I think that contributes sometimes.
Let me know how you get in if you go to the doctor, I'd be interested to know. X