I have a broken molar for some time now and started getting respiratory problems and nausea. Yesterday, after some probing, I forced out a huge chunk that had become loose and painful. Also, no matter how often I brushed, the breath was rancid. After this chunk came out, I went 2 sleep from the pain and woke up 6 hours later feeling like a new person! Is this really possible from a bad tooth?

Yes.

Thanks 4 your answer. Do u know how this causes respiratory problems? Just curious

There are 100's of reasons for respiratory problems, only your doctor can find your problem.
But a bad tooth can easily cause an infection that will travel to all parts of your body. In some cases it can even lead to death if not treated correctly

I had chronic bronchitis for months from an infection under a crown. Not even the newest antibiotics worked, I got worse and worse, couldn't even climb stairs, finally saw a specialist and had tooth removed (regular dentist missed it!) I felt better in about 4 days.

How do respiratory conditions connect to a bad tooth? The infection spreads and the ordinary mucous in your sinuses, eustacian tubes, etc, being warm and moist, are breeding grounds for bacteria. Bacteria are all over our bodies, inside and out, all the time, but they are usually fought every minute by a healthy immune system of white blood cells, lymph, and so on.