You may also want to keep an eye on your neck, you might have a pinched nerve that when using the weights in a certain positon puts presure on that vetebra, this will cause you to get black spots and pass out, or close to it. I had that problem a few years ago, just I actually did pass out one time. Luckly, I was putting a set of dumbells down and went down on my butt instead of forward.
I went to my chiropractor, he he took about 5 minutes and fixed the problem and never had any black spots since. I know some people don't like the idea of a chiropractor, but they do have to go threw med school, and then have to to to chiropractor school, so it isn't just something anyone walking past you can do. If you decide to try this route, ask around, as like medical doctors there are some good ones and bad ones. Mostly because they don't listen and think they *know*. There are also different schools, so just because you don't like one method doesn't mean you won't like one that does something completely different. It's just a trial and error thing, kind of like workouts on video, and you have to bounce from one to another until you find Cathe.
Getting adjusted doesn't hurt, it's just like poping your knuckles, more noise then anything. You maybe a little sore the next morning, it depends on how out you were and for how long. As your muscles were use to you being crooked and now they got to re-adjust to you being normal again. And they sometimes fuss about having to move back into position. But the soreness isn't anymore then having a good tough workout, and having the soreness the next morning when you get out of bed.
But back to your neck, do check your head and neck out, make sure those muscles are not tightening too much. Just simply tighting up the neck muscles really really tight can cause you to have black spots, get close to passing out. And this can be caused by including the neck muscles too much, and allowing them to sub for the shoulders, or the muscles might be weak that are near the nap of the skull and run down into the neck.
But if I were you, my first thing would be to get checked out by a chiropractor and see if it's a pinched nerve in your neck. Then go down the line. It's the quickest and easiest to fix, as medical doctors won't be able to treat it, they'll just tell you not to workout and run a bunch of nasty tests that will tell you, your prefecctly okay. And then they'll run more tests, and they'll never really see the problem, but you get to spend a lot of money to find out your normal. I did that, and I was so mad, I spend a lot of money and time, as well as pain as some of those tests are not nice, to be told I was okay and still had the problem and all it took was $40 to fix it and never have the problem again.
Good luck, do get it check as that can be come a very dangerous problem.
Kit
