Scared I took too much Tylenol

I have severe OCD and health anxiety and can’t sleep because I’m so worried :/

This might sound dumb to be scared about, and my mom is not concerned at all, but today I accidentally took more Tylenol than recommended. My mom said she has taken even more than what I did many times and been fine, but I’m still worried.

I took 1000mg around 10:30am, then around 2pm, then again at 6:30pm. So that’s 3000mg in 7 hours. I know that’s still under the daily recommended dose, but I took them too close together.

I’m 25 years old female and 150lbs. The only other medication I’m on is Lexapro 5mg. I saw online that I would have to take around 8000mg to do any real harm. Is that true?

I was having severe period cramps and I was delirious from the pain (I almost passed out at one point), so I just took them whenever the pain became unbearable again.

Can someone tell me if I should go to the ER? Google keeps making me worried that I am going to go into severe liver failure after this. I’m not having any symptoms but I saw that it can take days for symptoms to show up.

I have been to the ER so many times this year they probably wouldn’t even take me seriously.