I’ve always been very insecure about my ears and believe that they’re too big. What do you think? (Photo)

Rather than just looking at your ear dimensions on their own, it’s important to consider the size of your ears in proportion with your the rest of your facial features. An ear reduction can be performed if you’re unhappy with the size of your ears. 

Otoplasty refers to a procedure that corrects either, or both, of the following:ears that "stick outears lack an antihelical foldNeither of these indications are easily identified in your provided photos. Although, symmetry and proportions are difficult to determine in the photos. The most appropriate next step would be to consult with a board certified specialist that performs a large number of not only otoplasty operations, but other ear and earlobe reconstructive procedures to determine whether there may be another procedure that would adequately address your concerns.

Oversized ears usually benefit from an ear reduction surgery not an otoplasty. This can typically be done in the office under local anesthesia. Usually there are no drains, no outside stitches, and patients can go out in public the same day, although I usually recommend they low for the first couple days. Most of the initial swelling is from the numbing medicine and your body absorbs it within the first 4-6 hours. Obviously the body heals with swelling and inflammation and usually that maxes out at two days and then starts getting better. Most of these patients take no pain medicine and usually feel very comfortable going out in public within a few days.  I usually call my patients the night of surgery and check on them the next day. If everything is fine the next day, I then let them shower and they do not need a dressing over their incisions. They can usually start using make up after a few days.  At the two week check up, I usually have people start working out and then after six weeks they can do whatever they want. 
I routinely tell people to take a few days to a week off work and to hide out but some people are very nervous especially celebrities and I usually tell them to hide out for two weeks. As with any scar on the human body, initially scars are red, hard and raised and it typically takes six months to a year for them to become a soft thin white line. 
Additionally with recovery, there're many things we do to expedite healing such as nerve blocks during surgery, oral supplements, skin care and scar therapy recommendations, lymphatic massage sessions that are included in our pricing.
I strongly feel that it's very important to have an honest conversation with your surgeon about your particular situation, lifestyle, work environment and specifically which procedures you're having done so that you both have the most honest answer about your recovery and are realistic with expectations and results.
I would recommend that you see a board-certified plastic surgeon in your area that is a member of both ASPS & ASAPS and performs a lot of otoplasty and ear reduction surgery.
I hope this helps and wish you all the best in your surgery and event. If it does, please take a moment to up vote this answer on the “respond” button on the top right.