I never had any anesthesia for these injections. My surgeon doesn't believe in them. He says that every time a person receives anesthesia, it kills off brain cells. My cousin's husband is a nurse anesthetist, and he said that's a bunch of bunk. The shots aren't all that bad. Just lay there and relax. I have been through worse when I was shot in Vietnam. It felt like my shoulder was on fire. It was so hot that I kept looking at it and the Medic told me not to look at it.
The very first time I had them, I had 8 of them, maybe yours were different in some way from what or how mine were administered, but, they were quite painful without the anesthesia, which doesn't knock you out or anything it just relaxes you, there are various kinds they use, you still feel the pinch of the needle, but, you just don't care as much.

I don't know how many needles you get on your visits, but if you were to get 8, that's a total of at least 16 needles being inserted and that was my first experience. And yes, you are required to not eat after midnight or at least 8 hours prior, why you weren't told this is beyond me.
One or two needles might not be so bad, but my first experience I assure you was through the roof and they told me it would be as they suggested I reschedule for when I could get someone to give me a ride home. They don't normally give a series of 8 in one sitting, but, they were doing both sides of my spine at that time. I've since had it done only with a mild anesthesia since, and this time only on the left. I've also had nerve burnings done. Plus I'm needle phobic, so, I'm pretty worked up by the time I'm ready for the procedure even though I have a poker face, so no one is aware of just how much anxiety I'm feeling in anticipation of the needles. Well maybe my blood pressure gives me away somewhat. Frankly, I hate the IV needle insertion just as much as any of the others.
Brain cells, what brain cells, I've lost so many already, what's a few more every few months. All the other stuff, including some of the air, people take into their bodies on a daily basis probably is doing as much harm. I ain't worried about more damage to my dwindling brain at this point. On my bad days, I still reckon I have more cells to spare than many people I engage with in conversations. Soon I'll just be on most people's level. j/k
=======================================================================================
Quicksilver, glad you are resting back at home, I know how you feel, I've had such work done in the past and it will take time to adjust.