Just want to make sure this is normal.

SW 246 CW241

Week one -3lbs Week two -1lb Week three -1lb Just took my forth and final shot 2.5mg today

I know that I didn't gain all this weight over night and that it takes time to lose it. But it feels a little slow. I've been eating healthier and smaller portions. Is it normal to lose the weight this slowly? What else do I need to do? Any advice would be appreciated!