Is it legal for police to enter my home and seize marijuana due to my parents' claim that I was suicidal, and if so, how may I get this charge revoked

The home is in my name and in no way connected with my parents. I am 27. I sent a video by text to my boyfriend, who lives with me and whom I was arguing with over text, of me cutting my leg in frustration. I have been a cutter for over ten years and have only cut superficially as is clearly shown in the video. I never stated or showed that my intention was suicide, nor did I send the video to or personally involve anyone else. My boyfriend involved my family, and I responded to worried texts from my parents and siblings stating that I was OK and wanted to be left alone. I wouldn't let my family inside and was unaware of the police presence until they yelled at me and broke my window and entered. I was told I could go to the hospital but my dad began yelling while I was cooperative, and I was arrested immediately, uninformed of what I was being accused of or probable cause for police presence.I was charged with possession of marijuana/paraphernalia, located in a different room than I.