Don't worry lah, convenience store microwaved pasta is fine to eat during pregnancy, plenty of mums have it without issues. Just make sure it's heated through properly and the expiry date is okay, then you're good to go. If you're feeling unwell after eating it then that's different, but one meal definitely won't harm your baby.
Why is it not okay? Haha. I still eat microwaved food sometimes during my pregnancy and gave birth to a healthy baby. It’s not like you’re eating everyday for every meals too.