(not sure where else to post this, apologies if it's in the wrong place)
A few months ago I submitted an essay. I was going through a very rough time (I'll explain later) so submitted the essay knowing it was pretty rubbish, but was glad to get it out of the way. Today I received a letter telling me that there has been suspected plagiarism in this essay. It doesn't say which part of the essay or why I've been accused, but I am, so I need to attend some official meeting with the senate of my university.
Now, I haven't done anything like stolen someone else's work or paid someone to write the essay for me. I've reread the essay and noticed that I haven't correctly cited one of the academics I've discussed, so for example, I'm saying that "...Smith argues that blah blah blah" instead of "...Smith (2010: 45) argues that blah blah blah". I can't really see much more than that. Everything else is cited correctly and my bibliography is all fine.
Like I say, I was going through a rough time. My grandfather was very ill and I was visiting him everyday, which is why I wrote this essay as quickly as possible without really putting much effort/thought into it. He died a week after I submitted it. My mind was all over the place. I was under a lot of stress and was suffering from frequent migraines with confusion and slight memory loss. I know this isn't an excuse, but it explains my state of mind at the time. I was struggling to write it due to the constant migraines and would write a paragraph or two then say I'd come back to it when I felt better. I messed up and forgot to correctly cite one specific paragraph because I didn't go back over it when I should have. My professors know about my medical and personal problems. I'm a final year student and have never been accused of plagiarism before. I graduate in 3 months. I'm terrified I'm going to be kicked out of uni or something.
Can anyone tell me what may happen? I know it's different for every university/college but hopefully someone can give me some kind of idea. I will admit to making a stupid mistake and am fully aware it's my own fault - I know I should have properly checked my in-text citations, but I didn't. I just want to know what I should expect to happen.