Hi, i'm 3 months pregnant & eating a lot of crisps e.g.lays these days, they counteract my nausea 100% & make me feel good, are they awfully bad for baby?

Seems fine: The amount of recommended weight gain during pregnancy is dependent on your pre-pregnancy weight and body mass index, but is generally in the 25 to 35 pound range. As long as you are gaining weight at an appropriate rate as determined by your ob, the potato chips that soothe your nausea should be absolutely fine and in fact i would encourage them if they allow you to eat an otherwise balanced diet.