personally i would be more wary of the spring rolls than the prawn crackers. as long as everything is reheated super hot it should be fine. its the luke warm stuff that would concern me. i wouldnt worry about prawn crackers, go for it i say, the trace of prawn, if any, wouldnt worry me.prawns should be ok if cooked fully.
i ordered a prawn dish ina resto the other day and it came with other shellfish in. but reading here i am not going to worry, i didnt get ill. it says that seafood with bacteria wouldnt harm baby just make us ill. and i feel fine.https://www.babycentre.co.uk/pregnancy/nutrition/foodsafety/seafoodexpert/
just maybe give everything else a zap in the micro?