3 months with 2.5mg?

Hello, today I had my 4th injection (2.5) that is, I've been 3 weeks and lost 9kgs, it's a lot. I went for a check-up this morning with my doctor and she told me that I would continue for 2 more months with 2.5. I already imagined and wanted to stay one more month, but 2 more? I have a lot of weight to lose. Thank you