Wedding dress seamstress

I was told by the shop I got my dress, they will do an alterations appointment 3 months before the wedding - means the seamstress has time to do it and means I'm not panicking thinking it won't be ready in time. x

It depends how much alteration is needed and also what kind of service you go with. A dress shop that is dealing with multiple wedding dresses is going to have a fairly set timetable for alterations to ensure they can fit everyone in. An independent dressmaker is likely to be more flexible. So I don't think either of the timeframes you've been given are 'wrong', it's just down to personal preference/cost as to which one you go with.

My seamstress said 6-8 weeks prior, getting married 2 May and booked in for first fit 4 March.

She also said the same as what you have been told.