I have recently accepted a written job offer which is contingent on both background and reference checks. I was rather inexperienced with the entire job application process and resume writing at that time, and took some random resume advice for new graduates. The advice was that it was okay to leave out the word 'intern' and that I can change my job title in my resume to reflect my actual duties, and I thought that 'Software Engineer' was a better fit. My actual title is 'Web Developer Intern'.
I hope that the recruiter thought of my employment as an internship because the dates of my employment overlap with my dates of schooling. The role I applied to is also for new graduates with little to no experience, so I hope that my inaccurate job title is not a huge issue. The company has not requested any checks yet, but I want to be honest with my recruiter and tell her proactively about my mistake, but from reading elsewhere it's better if I don't disclose it until I am questioned. What should I do to minimize the risk in my situation?