I'm not a doctor, I don't know your specific conditions however I want to at least relay basic info.
Some other optionals treatments include;
Medication: The
PDE5 inhibitors sildenafil (Viagra),
vardenafil (Levitra) and
tadalafil (Cialis) are prescription drugs which are taken by mouth.
[10]: 20–21 As of 2018, sildenafil is available in the UK without a prescription.
[53] Additionally, a cream combining
alprostadil with the permeation enhancer
DDAIP has been approved in Canada as a
first line treatment for ED.
[54] Penile injections, on the other hand, can involve one of the following medications:
papaverine,
phentolamine, and
prostaglandin E1, also known as
alprostadil.
[10] In addition to injections, there is an alprostadil
suppository that can be inserted into the urethra. Once inserted, an erection can begin within 10 minutes and last up to an hour.
[12] Medications to treat ED may cause a side effect called
priapism.
[12]
It seems like injections are the last thing one would try in regards to medications.
Focused shockwave therapy: involves passing short, high frequency acoustic pulses through the skin and into the penis. These waves break down any plaques within the blood vessels, encourage the formation of new vessels, and stimulate repair and tissue regeneration.
[56][57] Focused shockwave therapy appears to work best for males with vasculogenic ED, which is a blood vessel disorder that affects blood flow to tissue in the penis. The treatment is painless and has no known side effects. Treatment with shockwave therapy can lead to a significant improvement of the IIEF (International Index of Erectile Function).
[58][59][60]
Testosterone: Men with low levels of testosterone can experience ED. Taking testosterone may help maintain an erection.
[61] Males with
type 2 diabetes are twice as likely to have lower levels of testosterone, and are three times more likely to experience ED than non-diabetic men.
Penile Implants/Surgery: Considered the last resort
Not to mention there is also excersize and healthy diet. I just know I would explore every other option before attempting injections or surgery. just trying to relay other options. I not judging. 
