Hello Aspirant. 

Firstly, you should not loose faith because as per now your results are not declared yet. Just wait till you get your results,  may be you score well in your exam so don't loose your faith because sometimes you think that you didn't perform well but you score nicely in the subject in which you think you are going to fail. So please,  be confident about result and don't loose hope. 

Now coming back to your question, here I'm explaining you akk about the eligibility criteria or NEET 2019: -

QUALIFYING: - 10+2 or equivei with Physics,  Chemistry,  Biology/Biotechnology an English as your core subject in both class 11th and 12th from a recognized board. 

Now according to CBSE,  candidates who will take class 12th board exam in 2019 and the results of such candidates are awaited can appear for NEET exam by filling code no 1, however qualifying the exam is mandatory any of subject i have mentioned above you will not get seat in MBBS college. It doesn't bother if you qualify NEET Or not but your 12th marks are important.

But if you get fail in chemistry,  you can appear for compartment and once you qualify your compartment then only you can appear in medical entrance exam because it is under the rule that the Candidate has to pass the class 12th with Physics,  chemistry, biology/biotechnology and English.  The minimum percentage required in 12th should not be less than 50% for general and 45% for reserved categories. 

So study hard,  and get ready for exam and all the best for you in board results. 

Hello,

No, you cannot

To fulfil the NEET eligibility criteria 2019, the candidate must have passed in Physics, Chemistry, Biology/Biotechnology and English individually in the qualifying examination.

Additionally, (a) Candidates belonging to the unreserved category should score a minimum required percentage of 50% marks in Physics, Chemistry and Biology/Biotechnology in their Class 12 or HSC examination.

(b) Candidates who belong to Scheduled Caste/Scheduled Tribes or Other Backward Classes (OBC) should score a minimum of 40% in Physics, Chemistry and Biology/Biotechnology in aggregate in the qualifying examination.

(c) For persons with locomotor disability of lower limbs, a minimum of 45% marks for General-PH and 40% marks for SC-PH/ST-PH/OBC-PH are required in aggregate across Physics, Chemistry and Biology/Biotechnology.

for more information: https://medicine.careers360.com/articles/neet-eligibility-criteria