LMAO at the reply you got. Very non-committal! haha!
It will be absolutely fine - much better than the diet of many pregnant women.
If you are looking for a really good natural whey reflex do one Called "natural whey" funnily enough lol
Same price as their instant whey and no artificialcolours, flavours etc.
That said if you use a good quality product (no comment on the existing one "cough") then you need not worry as good manufacturers will use sucralose instead of sucrose and be aspartame free anyway 8)