Totally Wiped Out, BP Way Up - Overtrained?

It stands to reason that peak training is not sustainable and sustainable training does not yield peak performance.  Hence, it is common and normal to schedule training in cycles to peak for a particular race.   The problem though is knowing what your sustainable level is and to get below that level when you are recovering. This is the part that gets in your head.  Your best training day, your best race does not become your de facto pace everyday forever afterwards.  Make sure the problem is not in false expectations of what your performance should be.while recovering.

I am not a doctor, or at least not the sort of doctor that can help you with medical problems, but fatigue is the symptom of so many other medical conditions that you really should not just assume that, just because you are coming off of a big build and race, that overtraining is the cause.  I see you are on that.

On symptoms of overtraining, the most commonly cited indicator is elevated morning heart rate.  The metric means taking your heart rate before you get up and move around at all.  I have had a hard time measuring this at closely similar conditions in the morning so that measurements are comparable.  What I go by is how I feel.  If I don't feel anxious to get out and run or bike each day, I am on the wrong side of the training peak.  Not a bad thing for a build but not sustainable.

On your varying BP, again, this varies a lot with conditions under which you measure it.  I assume you are measuring it yourself with a home monitor.  These are pretty good at measuring BP, but consistent readings depend on consistent conditions, i.e. same time of day, same resting conditions before taking the reading, same arm position, same breathing pattern, no distractions, etc.  Take about three readings and just pick the middle one to record.

My advice, cut training time by half, stay on the low end of heart rate (like 50% between resting and max), cut frequency of training to 3 or 4 days a week.