I had a planned CS due to SPD as well, and I often long for those wonderful drugs, must have been the morphine as i had an EMCS with DS1, which was great, but nowhere NEAR the blissful floaty feeling with DS2.
I remember being in the recovery ward, holding DS2, and feeling as if I was on a giant raft. The slightest slightest movement made me feel as if the raft was going up and down, but in a really pleasant way.
I, too, cried every night with sheer frustration and pain. And felt so guilty that I couldn't take DS1 to the park, or out to the garden for that matter. He was 18 months when DS2 was born, so was a lively wee toddler.
I developed SPD when I was 14 weeks and I remember going to Day Care with blurred vision towards the end, but was glad to be there, cos I begged, begged, begged them to let me have a ECS. The consultants and MW's were keen for me to have a VBAC, and initially, I was up for it. But even seeing me hobble after the consultant on my crutches didn't make him realise how bad it was. (to be fair, he did a wonderful job of my CS, opened the original wound and did a very neat job of stitching.)
The day I went in to have DS2 was one of the nicest days of my life, DH and I were both so calm and chilled out, as we knew that I would be taken care of, and my pain would be dealt with.
If i could get my hands on those drugs again, I surely would. I've never felt so wonderful in my life, the birth of my children notwithstanding.
Sadly, DS2 is 4 and a half, and my SPD is WORSE than ever! I so long to lie on my side for longer than 15mins at a time, and I often have to get up during the night for a hot water bottle and a very strong cocktail of painkillers. I've recently started getting shooting pains down my right hip/leg, which is my worst side. I'm fairly certain I'm developing arthritis haha!!!!
However, I do NEED to lose weight, have been caught in a vicious circle of comfort eating and not being able to exercise properly. It won't SOLVE the problem, but it must sure as hell alleviate it.
Having said that, given the choice between being SPD-free, and no DS2, well, I would still do it all over again. Having him is worth it, a small price to pay.
Good luck, enjoy the drugs, and I sincerely hope your SPD clears up quickly after the birth. It does for most people. I'm just awkward haha!