Yep, should be fine!! You sound like you're doing great, eating all the right things and the weight is coming off easily!! Well done!! I think my weight is stable atm but I was losing weight for ages I think due to breastfeeding and it never effected my milk supply. I found the only thing that would have an impact was the amount of water I had. The more I drink, the more milk I make. So just keep up the water intake.