I am also a 35 year old breastfeeder. Evidently we are a common breed! My periods started again when my little monkey was 10 months old, when she was still night feeding. I guess it must be down to the individuals hormones. On the bottle front I can recommend MAM bottles. Dd refused all others then at 7 months took whole feeds from these. They are brightly coloured bottles which I gave to her to play with first. I think this was the key to our success. Good luck.