My Gmail Account Was Stolen

I am writing because my Gmail account appears to have been stolen and I have suddenly lost access. I realized this issue just now, when I tried to log in and saw that I could no longer access my account as before. I believe my phone was somehow used in this unauthorized access, but I do not know exactly how the theft happened. I am very concerned that my personal information and data in this Gmail account may be at risk and that someone else may be using my account without my consent. I request that my account be recovered and that access be restored to me as the rightful owner. I also ask that any suspicious or unauthorized activity on this account be investigated and that necessary security measures be taken to protect my information.