what could be wrong with my jaw?

I've had a lot of "bite" problems, which is what yours sound like. I am including TMJ in that, which I also have, in this. Along the way of dealing with otolaryngologists (ear specialists) and the maxilofacial surgeons at Harborview, in Seattle, I've found a lot of things are "bite" problems. TMJ isn't the only joint problem that can happen affecting it all. If I were you, and you hadn't seen your dentist lately, I'd go see them again and tell them exactly what's all is going on. Perhaps, a new dentist to get an unbiased opinion. I had to do that without any prejudice to my usual dentist.

I saw my dentist and she wasnt helpful at all, which wasnt suprising since she's the one who caused this jaw problem, im now going to a specialist, actually i think that i may have some sort of jaw injury since it feels like the lower jaw itself moved/decreased range of movment in a why where i cant get with ny tounge to the roof of my mouth anymore, it only goes too foward where it touches the front teeth's or or too backwards its so weird, thing is i dont know what kind of injury can be caused by prolonged hyperextension of the jaw.

what makes you believe the dentist caused it?

A couple of years ago I noticed that when I closed my jaw, ONE side remained open while the other side was closed. The hygienist told me confidentially to try and avoid surgery on the jaw since it was a troublesome procedure. It took about a year for me to be very careful, no biting into apples, no crocking of carrots, trying to keep my jaw small even when I felt like opening it larger, and it repaired itself after about a year. I am now very careful with biting anything that forces my jaw open large. I don't know whether this helps in anyway. Good luck

TMJD, temporal mandibular joint disorder, is becoming extremely common these days. Mine was so bad I had to get an MRI and they want to replace my jaw joints, but that surgery is not covered by insurance, in fact, no TMJ treatment is covered by either medical or dental insurance! as the one comment said, keep your jaw, small no hard lighting and you might have to take mild pain relievers. Hopefully insurance will start covering these procedures so we can get some relief. Good luck to you!

did you have similar symptoms of difficulty keeping your mouth closed and putting your tounge at the right place?

No, my TMJD developed as an adult. There is a TMJD FACEBOOK group that has a lot of information and advice, if you’re interested

Firstly, have you let your dentist know you are having these problems?
There are a few things that come to mind but mainly when you speak about your tongue and it's unusual movements and "feeling" nerves come to mind. There is a condition called oromandibular dystonia (OMD) which can be caused by some types of dental work in some cases. Please look into this and contact your dentist first, then it may, if it fits, need a consult with a neurologist. This can often be temporary so don't be anxious, but do take it serious and follow up promptly. If it is dystonia, the faster it is diagnosed and treated generally the better the outcome of treatment.
Good luck.

first of all, thank you very much for your comment, the symptoms of this disorder really do fit my symptoms, I went back to the dentist but she brushed it off as teeth grinding being the cause even tough I had bruxism for years but never experienced this kind of stuff, also I had sleep apnea before it started but since it started it became so much more severe, I wonder if it is related to improper tounge posture idk. I made an appointment to a tmj specialist, do you think she could possibly rule that out? or should I see a neurologist?
thanks

you can go to an ENT for diagnosis and it is covered by medical insurance