Bad high with dark thoughts - strain advice?

Hi everyone,

I hope you guys can give me some insight on what the hell happened to me yesterday. My husband and I generally smoke sativa strains from a grower friend of ours, and that is what I prefer. Yesterday we were entertaining our out of town guests and they invited a friend of theirs over to hang out. She had a few joints with her but wasn't sure on the strain. I figured after smoking for so many years I would be okay and decided to try it. This was a stupid mistake.

Immediately after smoking half of this joint I regretted it. I began having dark thoughts and felt completely disconnected from reality. I was actually scared of myself. I felt untethered from the world and completely out of control of all my functions. I was anxious, paranoid and saw no point to anything. I had a series of "why am I alive" thoughts that caused a massive downward spiral.!It was so bad I had to cancel our plans to go out with our visiting friends because I could not function. I have never been so high for so long before. It lasted as long as being on mushrooms and did not taper off. I am finally coming down and it is 12 hours later. My husband also didn't react well but his thoughts weren't as dark as mine.

From the body high I would say it was probably an Indica strain, but does anyone have any insight to what it could have been so i can avoid this?

One of my stoned thoughts was that it could be laced with something but here we are 12 hours later that seems paranoid. However, I still feel a little stoned.

Has anyone experienced anything like this? What strain was it?