Your heart rate is rising by 30-40 bpm when standing, so it looks like POTS is likely. It looks like the rise is more extreme when you've been standing longer. At one point (07:30 PM 113/88 95 standing, making supper), your blood pressure is lower than at any other time except one, and your pulse pressure (difference between systolic and diastolic) has narrowed to 25. Pulse pressure is abnormally low if it's less than 25% of the systolic value, therefore yours should have been over 28. You're also a bit low after your walk to the mailbox. So Neurally Mediated Hypotension also seems possible. NMH is most noticeable after standing upright and very still (not shifting or fidgeting) for 10+ minutes prior to checking your BP. If your BP monitor gives an error message at that point and you aren't moving at all, it's probably because your pulse pressure is too weak for the monitor to detect your pulse consistently. Mine craps out at about 18-20 pulse pressure.