Flavia Bonato, MD

Probably your doctor has chosen not to put a larger size on the condition of your skin (larger sizes may lead to more streaks - which is irreversible),
because of their height / weight (too large prostheses can make the patient appear chubby instead of busty).
The submuscular inclusion takes a little longer to appear the definition of the round of the prosthesis.
The décolleté sensation will come with time. My advice is only to decide if you really want to have a bigger prosthesis after at least 6 months after your surgery.
Only after this time will you be accustomed to the new breast, you will have worn normal clothes and felt if you really want a bigger breast.

If you can, it would be interesting to have an ultrasound or consult with a doctor before traveling. It probably seems to be a contracture, but without examining it is quite difficult to say. Keep an eye on warning signs such as sudden breast enlargement, increased pain, redness, or fever. If any of these occur, seek medical attention immediately.

You are still at a very early stage of your recovery. There is a lot of swelling, especially in the upper part (which is normal).
Hematoma is a common complication, can be treated conservatively (without needing new surgery) but may delay your recovery a little more.
Patience is required, follow your doctor's recommendations and observe warning signs such as local heat, fever.
If this occurs, you should tell your doctor promptly. What we see most is that over time the hematoma resolves and most of the time it is not necessary to reoperate the patient.
If your doctor authorize, warm compresses usually help the discomfort. But only do it if your doctor authorizes.

It's super common, especially if you are thin. Occurs due to the space created for placement of the prosthesis. For comfort, lymphatic drainage helps a lot and usually makes it resolve faster! 

Usually chalazion resolves with warm compresses and the treatment that you did. I don't think injections would benefit you. The lump (if it's not hot or soar or swollen) probably will desapear with time. But If it doesn't get better, or if the pain, swollen reappears it's better to do the surgery. It is a very simple surgery, different from the blefaroplasty, and in the  most of the times the procedure is covered by your insurance.