Might've Unknowingly Put Some Inaccurate Information about a Extracurricular

I might be be being paranoid but, on my UC app, I said that the annual fundraiser I was a part of raised about a million dollars and, upon further research, that might be wildly inflated. I looked up the annual revenue for the organization and talked to a participant and came up with this roughly estimated number. I know I shouldn’t have put something that I wasn’t absolutely sure about on my application. After reading the description of my extracurricular, I’m worried that it might also look like I accomplished this with a small team, when, in reality, there were about a hundred people involved. I didn’t really have room to clarify this. Also, I tried to estimate the number of hours and weeks that I did this extracurricular the best that I could, but what if it’s not accurate? I just want to be honest and open with the UC’s and I don’t want to jeopardize my application over something like this, even though I don’t know how/if they investigate this stuff. Should I email them and explain, or am I fine?