(I moved your post in together with the same discussion for this you already started. Please try to keep posts of the same subject together so people don’t lose the thread.)
Sound like you pulled too much energy into your middle Dan Tian. That would cause heat sensations and psychic effects. It’s best to stop and heal when this happens. You are being taught energy techniques by people with no safety or understanding of what yo are actually doing. You can really hurt yourself if you are not careful. The qi body is not invincible and you can damage it like you can any organ.
I don’t know this book, but given you already had issues with it, I think it’s ill advised. Why not get some qigong basics under your belt and then come back to it. You should be drawing to Lower Dan Tian not middle, you need to know how to ground and clear excess qi (like a pressure valve on a cooker), and you also want to cleanse and banish parasites attracted to all this free energy, that will mess with you and derail your efforts.
This is the gateway to your Upper Dan Tian - so now you have this acivating and should also be getting more psychic experiences from this.
No, when you’re right, you’re right and you know it. Trust your gut, this seems a mix of great work developing your qi, but a little too much and unbalanced in places.
I recommend you next learn how to run the microcosmic orbit - also called the lesser heavenly circuit and similar, which will help you balance this energy safely across all your meridians and between yin and yang energies.
Good walk-thoughts for doing this are this youtube by Benebell Wen,
and the instructions in the book Dreamgates by Robert Moss - his is rather excellent when you don’t know all t he acupuncture points and explains it very well.