This Is No Joke, Recently I Was Invited To By

This is no joke, recently I was invited to by a group of friends to visit our local beach where clothing is optional. I am an average size when erect, about 5", however otherwise say in front of other people I am a bit nervous and have a very inferior complex because I then look pre puberty at only 2". This has always bothered me, if I do say jumping Jack's for a minute or so the blood flow finds its way down and I appear normal.
Is there anything that may help my condition? I thought about taking a low dose of aspirin to thin the blood to help with flow. I have also experienced an industrial injury years ago landing on my Perineum area, fell on top of like a fire hydrant some 8 feet down, I currently use a tens unit for pain management in that area. I also tried a spinal cord stimulator with not a lot of relief.
Most importantly is blood flow to the penis at this time, any ideas, thanks.