Year 12s: what will be the first way you research your future options? >>

Turnitit highlighted a small paragraph :/

Turnitin highlighted two small paragraph which is about 4/5 lines long and said it was from a online source.. Which I myself haven't heard of or used, however I got someone to help me with the work and it looks like they dropped me right in it, as it was their bit that came up highlighted on turnitin.

My similarity was only 18% and the short two paragraphs were 1% each.

The rest were small words and really nothing to worry about as I referenced it all.. But I'm really worried that I will get penalised for plagiarism abd it was never my intention to copy of a source... Really don't know what to do :/