the support test is not based on number of months. If you were considered to have lived with your parents for those months. If you provided over half your own support ( support test link https://apps.irs.gov/app/vita/content/globalmedia/teacher/worksheet_for_determining_support_4012.pdf) then you are not a qualifying child.
Being away at college is normally considered a temporary absence from home and not considered not living in the home.
But if you meet all the rules, your parents amended their return to remove you as a dependent, then of course you can claim yourself.
If your parents do NOT amend their return, the IRS will determine who can claim you if you both claim yourself. 2 returns can not claim the same dependent exemption.
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