I was recently going over my PhD application research proposal and to my horror I found a few mistakes that might constitute as plagiarism. Even though it is fully cited and even though it is common knowledge, there is half of a sentence of about 28 words that might be paraphrased too closely to the source. The kind of sentence it was was basically x is something that is y. I only added or changed two words for clarity. This was completely unintentional and I didn't realise it was so closely paraphrased to the source till I looked at the source again during a literature review.
I have already been accepted into the program and I feel terrible, like I have cheated my way in. I do have kind of a sense that I might be making a mountain out of a molehill but I can't help but feel like they're going to revoke my degree if it ever was discovered or even if they never do discover it, I feel fraudulent?
Can someone put my anxiety into perspective? They don't throw you out and take away your degree for a few sentences, right? Do I need to address this in some way with my advisor or the university? I definitely will be more careful in the future. I have booked an appointment with the counselling service at the university to see if they can help too.
Edit: In other instances, I found a two word phrase that probably should've been in quotes and forgot a page number.