Hello Lacey Susan!
My experience with Humulin 1 started about 3 months ago, when in spite of medication rather like yours, my HbA1c had hit just over 8. I've been diagnosed for more than ten years. In my case, the diabetes clinic in Bolton (really good people there) left me on Gliclazide, reduced my Metformin to 3x500mg tablets, and discontinued the Sitaglyptin; I then started Humulin I at 10 units at bedtime, and soon upped this in stages of 2 units until 20 units seemed to do the trick. My average bood sugar readings in the morning are now about 7. Sometimes I'll go down to near Hypo levels in the afternoon, yesterday for example, it hit 3.2 at around 5 pm, so I need to be aware of this possibility when driving. (Have you informed DVLC that you're injecting?) My last HbAic, about a month ago, was 7.1, so I'm reasonably happy, although there are occasional readings around 8 or 9 at breakfast time.
As I increased the Humulin I from 10 to 20 units, it was easy to tell that things were coming right. So I would say (with the agreement of your clinic) that you should experiment a bit, but give each new dosage a week or so for things to settle down. My experimental period took about 2 months.
I've never had problems with my feet, although some years ago I had discomfort in my thighs which drove me absolutely spare! The problem eventually went away. No idea idea why.
Give it a bit of time, and good luck!