Nearly fainted/blacked out

Angie
37+5 and the heat index was something like 103 here in TN😓. We have been trying to furnish a rental and I was running around all day. I also went for a 2 mile walk this morning early in the shade before it got too hot. Needles to say, my legs gave out and the " lights went out". I slid against the wall and couldn't lift my arms or do really anything for about a min. Felt tingly all over and had a hard time breathing until I came back to normal. I think I stayed conscious the whole time, but it was fuzzy. I don't think I drank enough water...not sure. I actually felt fine until it happened. No warning signs. Not sure if I should go to the midwife or not. Going to tell her in the AM. Feel fine now and he has been moving a lot. Has this happened to anyone else?😕