Almost fainting??

I am going to consult my doctor on Monday but have any of you ladies had any issues with fainting? I live in Ontario and its getting pretty warm out and within 3 days I have almost full out fainted.

I wasn’t hungry(probably ate within an hour), I wasn’t dehydrated, I was indoors, I was standing both times.

Incident #1

I was standing in line at a hardware store maybe for 3 minutes. I noticed my eyesight started getting fuzzy and I was starting to sweat. Before I knew it I was sitting on a box with my eyes closed. When I stood up after 2/3 minutes my ears were plugged.

Incident #2

Standing in my moms kitchen I started to sweat I thought I was just getting warm then I got dizzy and couldn’t hear.... I then said I have to sit down and it stopped.

I’ve never had an issue with fainting before.