Hello @Zahid,
please see the answer of lawyer Marcel in the posting linked to below, it will answer your question very detailed, it doesn't matter that the country mentioned in the question isn't Bulgaria for it's valid for EU countries: ****://tinyurl.***/y8oexpxo
Your last question needs an answer though: You will be sent back to Bulgaria (e.g. according to German law because of § 27 und § 34a AsylG). Procedural base is the Dublin Convention.
Best regards
Jan