Young (18) but Uneven Breasts

In my opinion, you would need a lift and reduction on the right to roughly make them equal. Subsequent to this youcould udnergo bilateral augmentation with implants (saline due to your age) or consider fat grafting for a  subtle but autogenous tissue augmentaiton without implants. This may take more than one session.

Breast asymmetry is a very common problem for a lot of women. In your case this is compounded with asymmetry with involves both size and shape. I would also point out that you also have a tuberous or constricted breast deformity which needs to be corrected. There are numerous different ways your case could be done. I would recommend a combination periaeolar augmentation and mastopexy which will address both the size and shape issues. Make sure to visit with several doctors and spend time looking at their before and after pictures with examples of cases like yours.

A breast implant on the smaller side won't have the same shape as the larger side, which sags.  A combination of augmentation for the smaller breast and a reduction with peri-areolar lift on the larger side can improve the symmetry.  The reduction is useful because it lets you have a more similar sized implant on the two sides so they age and settle more similarly.  It is best to do this when you are at an ideal weight.  Changes in weight will change the result of the breasts.

Certainly you are a candidate for surgery.  I would probably recommend an implant on the left and either a lift alone or a lift and small implant on the right.  The areola can also be reduced at the same time. Now, realize that not only are no two breasts the same before surgery, as you can see in your case, they will not look the same afterward, but should alot  be better.

Breast asymmetry is very common and surgical correction is possible. In my view, a correction for you is actually a reconstructive procedure due to a congenital discrepancy in your breasts. Some insurance companies cover this type of reconstructive breast surgery. The correction often requires more than one operation. The areolar sizing is definitely correctable. I recommend that you seek a Board Certified Plastic Surgeon in your area with a lot of experience with breast reconstruction.