Very sore in a very weird place. Is this normal?

I have been sore in that exact place for a while now, I think I pulled whatever muscle is on the underside of my right forearm. Is that what you mean? Right below where your elbow bends on the underside?

I've had this exactly numerous times after intense biceps work, especially after preacher curls I find. It'll go away eventually, just like regular DOMS. My best guess is that it's the biceps tendon that is sore. Keep in mind that when you weight train, your tendons and ligaments get trained as well as your muscles.
If it doesn't improve, or becomes more like pain than soreness, perhaps get it looked at. I wouldn't be worried.

Non-medically trained personal opinion (from prior experience with similar aches): Likely mild tendinitis. The weights stress not only the muscle but the connective tissues as well. Usually only requires a few days rest to go away. Ease into the weight training for a couple of weeks to allow everything to acclimate to the new stresses. If it continues, see your doc.

I had what I likened to a carpel tunnel like pain in my wrists when I started ligting heavy weights. Until my muscles caught up and could properly support by joints, I had pain. Rest, ibuprofen if needed, a little ice, and some compression helps a LOT!

My fiancé and i started weight training the other day and I LOVE IT!!
Anyway, long story short… we were working on biceps on Monday. Yesterday and today when I extend my arms, right where you bend your arm, is very sore. Not so much my biceps, even though they were sore yesterday, but right where the lower and upper arm meet. What did I do wrong or did I do anything wrong. And is it normal to be sore in that area?

If you are talking about your elbow then it could very well be "Lateral epicondylitis or lateral epicondylalgia, known colloquially as tennis elbow, shooter's elbow, and archer's elbow or simply lateral elbow pain, is a condition where the outer part of the elbow becomes sore and tender."

Inflammation of the elbow occurs with me also when I do bicep and tricep lifts and it happens mostly when I do not stretch out my elbow during the work out or lift to heavy and lose my form. If this is the case than put an ice cold bag over the outer part of your elbow for 30-40 min and if you are able to do so take an advil or 2. Be easy with your elbow and let it heal or the inflammation will get worse. I have had it so bad once because I kept using my elbow that I could not bend my arm straight, and that took over a month to completely heal. It sucked so take care of it now before it gets worse IF this is the case.

I would say if its just sore its probably normal. I have had soreness there before from strenuous bicep days. Sometimes you dont realize all the parts of your body that are going to work until they hurt! Im sure it will go away in a couple of days!

I also like your description for "elbow pits"!

That is the very end of your bicep, where it actually attaches (inserts) into bone. It makes sense that you would be sore there.

been sore there, to a bigger or lesser extent. Weirdly, warm-up beforehand does not seem to help but stretching the entire arm does. Just lean your entire inner arm against the wall and lean gently but steadily against the arm while turning your torso away from the wall (to the count of 10 or more). Shift your weight/angle to find the spot that's in need of stretching.

Weirdest soreness ever from workout? from the neck down to the buttocks, my ENTIRE back. All of it, every single muscle, including the sides. Lasted for about a week, too. It was my own fault, lol, I asked for suggestions for a back workout and then I did all of it...