Hey ! Your expected score is good to get a seat in many of the government colleges(excluding the top ones) , but only if you apply through 85℅ state quota .And if you apply through all india quota , so your chances of getting a seat in government college seem very less .Because with 550 marks ,you can expect your rank to be under 10000, which woulx earlier come under 1000. And such rank does not drop you on a safer side to get a government college.

You can also predict your chances by using NEET UG college predictor tool by giing through the following link :

https://medicine.careers360.com/neet-college-predictor?icn=neet-clgpdici%3Dqna-answer

All the very best!