I agree with everyone here, your instructor should have never hand you the transmitter. His job on the first flight was to trim the plane and test its airworthyness then land and inspect the plane for any anomalies. The next flight is on a buddy box or no next flight...no options. As for being embarrassed, don't be...during my training, my wings decided to separate during flight turning the fuselage into a missile. My instructor nervously laughed as we walked out to retrieve the scraps while the peanut gallery made their comments about the spectacular impact. Upon inspection of the wings, turned out I didn't use enough epoxy to join them...lesson learned. New trainer and 1 month later, I'm back in training, solo'ed a couple of weeks later to the applause of the same peanut gallery. Hang in there and get back on the horse in front of the same crowd, just insist on the buddy box until you are completely comfortable with all phases of flight including the mandatory landing.