[Closed] I have an embarrassing problem...I can't get it up

No, seriously...

I probably fall within the typical STW demographic (middle aged bloke) so I'm sure I'm not the only one with this problem but I'm trying to isolate the cause and likely prognosis:

(1) A had a minor crash a few weeks ago which resulted in a painful saddle to scrotum interface and a very small cut to the sack. TBH, I didn't realise I'd cut myself until I took my shorts off later and noticed a small amount of blood.

(2) I've been taking anti-histamines - apparently, erectile dysfunction is a potential side effect. Needless to say, I've stopped taking them now

(3) I've been doing a helluva lot of riding recently...backwards and forwards to work most days, the odd evening ride plus anywhere between 3 to 5 hours on both days at the weekend

(4) New saddles on my road bike and my mtb - both WTB as that's what I've been using for years. I tweaked the saddle angle on my mtb so it's pointing slightly nose down as I'm presuming that may take pressure off the blood supply.

Anyway, last couple of times I've got jiggy, I can't manage anything other than a slight semi...previously, it used to point proudly and firmly skyward, just like it's done since my mid-teens...even a new supply of porn hasn't fired up the old mans imagination.
My balls also ache but there's no sign of blood in the semen

So, before I go to my Doctors, I thought I'd canvass opinion from the experts...anyone else suffer from this from too much riding, poor saddle or accident?
What did you change and how long til you were back to normal? Or do I have to face up to the facts:I'm too old for sex?

NB: I'm a non-smoker, don't do drugs, don't have diabetes, don't drink massively - these, I believe, are also possible causes...