It can take a while! Some people feel it right away, others don't until they go up in dose. Don't get discouraged yet! Some people don't feel much until they get to 1mg.
I'm doing it, but it's all trial and error. I go up by 0.5mg increments. The jump from 5mg to 7.5mg messed me up, so I dropped to 5.5mg the next week and been doing 0.5mg increases since. I'm at 6.5mg now.
For pressure spots, keep the area clean and VERY dry. You can find silicone foam dressings at any drugstore; change them as needed. If it's not improving, see your doctor.
With the itching, ensure you're well-hydrated; sometimes, it's that simple. Also, consider a cream with urea/carbamide. 10-15% might help. But since it's itchy enough to scratch to bleeding, do see your doctor to rule out eczema or allergies.
It's great to see visible progress, but remember that these meds aren't just about weight loss. They have incredible health benefits, especially for people with certain conditions. Focus on overall well being!