Nesting is cruel

So, everyone talks about women and their need to nest during pregnancy. I know it gets more intense as the birth draws closer, however, there is a new motivation and inspiration to get things done that was not as strong before. I am noticing this already and what I am also noticing is how doing little things like an hour or so of sweeping and picking up do a number on my body that they didn't before.
This weekend, I was not exactly Superwoman, but I cleaned(thoroughly) our bathroom. The sink, the tub, the toilet, the floor basically everything but emptying out the cabinets, which also needs to be done.
I did some laundry, some picking up, spot cleaned the kitchen, and decided to get our back porch cleaned off. I also went grocery shopping. None of these were exhausting but they did require some bending and twisting.
Last night, I honestly couldn't even walk. I was holding myself steady on walls and furniture. Hobbling about like a little old woman. My lower back and hips hurt so badly I felt physically ill. I cried on Mr. W and told him if it didn't go away, I couldn't do this for another 23 weeks. I took Tylenol and waited as it did nothing.
I am happy to report that on waking today, I felt completely better.
Now, my thoughts are that staying busy and moving around and getting in some activity are good for a pregnant woman. If I just sit around, what else will I do but eat and swell, right?
I know they say not to get too much in, but just housework?
As this urge gets stronger and stronger, and I just get bigger and bigger, how am I supposed to "nest" without a pain management support group?
It really is cruel, that desire to get things done, how it drives you to making yourself feel so totally crappy. I guess I am going to have to try spreading chores out and be a little miserable everyday, as opposed to totally miserable here and there.
Nesting really is for birds.