I didn't see any noticeable difference until about 6 months. If you read the posts above, Cassie4U22 also said it took her about 6 months to see a difference. So I think it could be the same for you, that you probably may not see any big changes until about 6 months.
The pits on my forehead were quite deep, about 2mm. I had 5 of them there. I also had 3 immediately above my upper lip (from picking and squeezing out blackheads). I'm not sure if they were icepicks. They were not exactly very sharp, but deep and wide.
All the pits on my forehead are almost completely filled in already. You don't notice them unless you come very close. Those immediately above my upper lip have improved in appearance a lot (much smoother), but not filled in as much as those on the forehead.
So I recommend you stick with it. It takes time but it will work out in the end. Cheer up.