The Lisinopril HCTZ could be causing the low potassium
diarrhea and other symptoms as well.
The combination of taking a diuretic drug ( even if it is combined with an ACE inhibitor) and diarrhea ( which could be another side-effect of your drug intake)
is concerning, since it results in significant loss of electrolytes and minerals in general.
For now try some coconut water which is very rich in electrolytes and consume some potassium rich foods, like
bananas. This should help also with the cramping, a hallmark
sign of low potassium and electrolytes.
When we stress frequently, our bodies can get depleted fast from certain nutrients, vitamins and minerals, as the body uses them to deal with the ongoing stress, thus leaving us more vulnerable.
My opinion is that you may benefit from anti-stress supplements, like B complex, but I would recommend you look for the ones which contain B12 in Methylocobalamin form, PLP B6 and Methylfolate, which are the metabolically active forms (bioavailable and need no further conversion).
If you can't get them in a B-complex, you will have to get them separately.
This could also help with the weakness, tingling and other neurological symptoms.
I have a genetic predisposition to HBP, however, I have never taken meds for it.
Instead, I take arginine , a precursor to nitric oxide, which is a known vasodilator, which helps control my HBP.
Also, I have optimized my diet, take Omega-3s, go to the gym 5x weekly,I cycle, walk, swim, do Yoga, Qigong and I do meditation and breathing meditation a few times a week
(all this also helps with anxiety and stress management).
Consult with a Natural Health Practitioner.
You may not have to stay on your medication for life and definitely you don't need to suffer like this much longer.
Let me know if you need more details.
Best wishes,
Niko