scary trip to the grocery store

Mommy of Two
So husband, DD and I went to the store to buy groceries. About three isles in I started getting really nauseas. Whatever I'm 16weeks and I'm still experiencing nausea from low blood sugar from time to time(mainly in the morning). Anyway then my arms turned really cold and my arms started to tingle. Next thing I know I feel like I'm about to pass out. Extremely dizzy and lightheaded. I have never felt like this before. I had to go sit on the nearest bench for 10 minutes while husband finished shopping. Anybody else go through something like this and what was it. Should I call my midwife tmw or today's after hour midwife?!? TIA I appreciate any input and advice. So I can be better prepared in case this happens again. I'm so glad husband was with me because I don't know what I would have done if I was alone with my toddler.