I hope that you can see, in time, that the size of ones penis is not that inportant in terms of how two people can make satisfactory and enjoyable love. Somewhere recently I came across a true story (and I'm not sure where) told by a very experienced woman, that her best ever experiences with a man sexually (with intercourse) were with the man that had the smallest penis! I'm not kidding at all! I may be able in time to direct you to this story that I'm writing of.
I'm not writing from personal experience of PE but from extensive reading of the scientific literature on sexual difficulties, primarily RE. Premature ejaculation can be helped and is not nearly as complicated to find a answer to as retarded, inhibited, or delayed ejaculation. There is plenty of help out there for you. If you can, try not to allow your anxiety to get to you through the help of a caring professional. All you may need is a small amount of the right anti-anxiety drug, antidepressant, or help with behavioral modification and for a short period of time.
I suggest that you read about the use of varying drug aids for paruresis since it is my belief that most of this can be made applicable to premature ejaculation. Just some thoughts.