I really need help, friends and rumors drama.?

[DaNceR?]

I really need some advice. Okay, so to start off I'm in middle school. So the other day, i saw a girl who I'm not really friends with but we know each other in the office crying and saying something about her grandpa, so i really wanted to know what happened, so I told a few people what i saw and that i thought maybe her grandpa died, so i thought maybe someone would know. Then the week went through and nothing that had anything to do with that came up. Now today, the girl texted me asking why i was telling people why her grandpa died, because apparently a lot of people found out, I don't know why, but i panicked and said that someone told me that, so then she asked who, and i really don't know why, but i said it was Sara, a girl who is a grade below us that i am pretty good friends with, but she's kind of a mean sometimes so i guess i just thought i could blame her, so then i made up this whole story how Sara came up to me and told me that she saw her crying and saying that her grandpa died, and that i texted Sara asking why she told me that the girls grandpa died, and I told the girl that Sara just thought that because she had seen her in the office, so now, she thinks that Sara started this whole thing, when Sara had absolutely no part in this. But I told her not to tell anyone in was Sara because i told her she said if i told her it was her, she'd never talk to me ever again, and i added some more stuff, so I'm pretty sure she's not gonna tell anyone it was Sara, and shes not gonna say anything to her, but I still have this big hole in my chest and I feel so scared and sad and I just really needed to tell someone. I also told her that I only told one person that her grandpa died, when i told like 4 people. I really don't know why i did this, i dug such a big whole for myself. I really need some advice because I'm just so stuck.