I'm hoping this clears up some questions you may have, and you can understand the full depth of the piercing healing stages.
To simplify it.
The piercing site will be sore for the first few days, you will see signs of site swelling, bleeding and bruising - this is normal.
Swelling stage can be from 2 days to 6 weeks, sometimes longer. Best way to get rid of swelling is keeping hydrated, no touching it, no sleeping on it, and just leaving it alone. You can do some cold compression, that can help with swelling and bruising. You will also see more discharge at this stage, the discharge will be clear to yellow colour, it's totally normal.
After your downsize which is at 4-6 weeks, you'll notice that your jewellery is snugger to your piercing site, but at this stage your piercing is still in the healing stage, it's still fragile, sore, uncomfortable and a little swelling can be there. You will see some discolouration of your skin tissue, don't worry that's normal too, just means that the blood flow is building meaning it's healing correctly.
8-12 weeks is the period where you can remove jewellery, but not for a long period of time, as with piercings they are unpredictable so the piercing to shrink or close up is unknown. It will be fragile and sore when removing and installing jewellery, so please keep that in mind. You'll feel itchiness and tightness, this is normal, your skin is a living and working organ so it's trying to understand what the hell is going on.
4-6 months is the fun part, PAITENCE. Keeping the piercing area clean, and following the aftercare instructions, it'll be a breeze.
6-12 months, healed piercing, as stated it can take longer than this, but usually at this point your piercing should feel more comfortable, not fragile, easy to change to different jewellery, your skin is back to normal colour, still a healthy discharge and your jewellery shouldn't move about much.