Hello Havana, Dont lose hope since you can always try again next year with more zeal. For now, you can check this link for cutoffs and colleges: 

https://medicine.careers360.com/articles/neet-cut-off

https://medicine.careers360.com/neet-college-predictor

The OBC cutoff for NEET 2019 was 133-107 (40th percentile)

You may still try for

• Savitha Medical College, Chennai
• BLDE University, Bijapur
• Sri Lakhsmi Narayan Institute of Medical Science, Puducherry
• Yenepoya Medical College
• SBKS medical Institute  

Hii..
At 431 marks It is Not possible to get on the all india seats quota..You can try On state level quota.There might be possibility to get admission under state quota because there are 85% seats are available for State quota.
You didn't mentioned Here your state so I cannot tell you whether you can Get in to it or not.
Here i am giving you all India medical college last year Cutoff please go through it.
https://www.google.com/amp/s/medicine.careers360.com/articles/neet-cut-off-for-government-colleges/amp

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