OMG I am a TURTLE!!!

I did the Ride for the Rock. It is a very nicely done ride for a local charity. It was still quite cool. I put on my usually winter kit and assumed I would be pealing parts of it off during the ride. While I never did get cold I never took anything off either. I rode the 50K and I really had a hard time. I was dropped by the whole group and they were completely out of sight within 2 miles of the start. This is so hard for me. Try to imagine if you were a cyclist and you were able to ride at an average speed of 17-19 mph on a 50 or so mile ride in this area and were climbing the hills here at 8 to 12 miles per hour and over night you had to go to averaging 9 mph if I am lucky and climbing hills at 2 to 4 mph and having to drop your mileage for rides back to about 30 miles in distance because of the time it now take to ride that far and see how you feel. I want to do this and I need to do this but it is so hard to be SO slow.
When I first got on the trike the seat felt funny. While riding I had trouble steering the trike on some down hills. I finally stopped and checked the seats lower bolt - it did not seem loose but I put a wrench to it anyway and was able to get almost a whole turn on it. This seemed to fix the funny feeling and the down hill problems. Also I had not been feeling well for most of the ride and when I stood up to work on the trike I almost passed out, I got real light headed and faint. I garbed hold of the faring to stead myself and just waited - it passed slowly but I did not feel OK until I sat back down and not for a little while then. At about 13 miles my butt started to hurt like it has been since I got the chrom-molly seat frame. The pain got worse and worse no matter how I tried to sit, then I lost part of the feeling in my right leg. The calf and ankle did not feel like they were asleep like for loss of circulation it just felt not there and unresponsive but I could still pedal. When I got to the SAG stop, I was surprised they were still there, and when stood up the feeling came back to my leg and my butt stopped hurting. From the SAG stop I had about 12 to 14 miles to ride - since my butt did not hurt until miles 13 I thought I would be OK however it started hurting again after about 6 miles and my legs was numb by 10 miles past the SAG. I really struggled to keep riding - not because I was wore out but due to the pain. I have got to find something I can do about the seat or frame of the trike to be more reclined or something. I did finish the ride and I did enjoy it but I was hurting.