No, you cannot get a seat in MBBS with 126 marks at state level. The competition is quite high and you have to score atleast 300 to get a seat  (private mainly) in state level. Do more work and give the exam again if you somehow manage to score 500 above you will surely secure a seat for you no doubt.

You can also use the college predictor tool to know if you are getting any college or not.

https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp