Extra money was deposited into my account

I have a chime card that I get my deposit on . This is the second time money has been added onto my card and I have NO CLUE where it came from . It doesn’t show up in my transaction history or nothing . About 3 weeks ago I had about $80 deposited on my card and I didn’t know until I went to go check my balance and it was more than what it should be . And just this morning I have about $70 on my card that I was saving to get my kids costumes . I just got my daily balance notification and this shit said $313 😳 I check it to make sure I’m not tripping and yes it’s true . But I’m checking my history to see where the fuck it’s coming from and it’s not coming up . I’m so confused and of course I’m not spending it but wtf ..