I think most breastfeeding mothers can probably relate to the feeling of not liking breastfeeding after a certain point in time. I do feel like many of us develop an aversion to it after awhile which is biologically normal, and that we keep doing it because it's easier than the alternative. But I think these feelings are what shapes the weaning process in addition to introducing other foods.
Seven months does seem kind of early for it to start, unless perhaps you are pregnant...I have heard that that can contribute. There is a feeling I've heard other women talk about, that I kind of experienced myself while nursing a toddler, and that was just this feeling of wanting to crawl out of your skin, kind of a restlessness, and it being something you really don't want to do. Generally what helped with that was distracting my brain with things like reading a book or watching tv, and sometimes physical stimulus on another body part, like pinching or scratching my forearm to get a different set of nerves firing.
I have also heard some women phrase it at around 4 months, they really wanted their bodies back, and my sister expressed horror of nursing a baby that was 6 months old, because that seemed strange to her. But I don't know if these are specifically related, I think they are probably something different, maybe a combination of social conditioning and just wanting to move in a different direction.
I agree the pumping at this point would make things harder. I don't remember really loving breastfeeding until my first child was older. By 9 months, things were going well, and by a year it really felt like smooth sailing, and I couldn't imagine trying to wean. But by that age, I didn't pump at all, I mostly did that in the early days to build supply and if I had to leave.
Best wishes to you!
One thing I do is count down from 10. It's good for them to learn nursing is a privilege that can be lost temporarily if they hurt/annoy mommy. My 28 month old has a tendency to nurse out of boredom and I find he'll play with my nipples rather than nurse, he bit when he was younger. I do hate nursing when we're having one of those days/weeks but its temporary.
Another thought is it sounds like maybe you're a bit burnt out/overwhelmed in general. Maybe you can find some time for yourself to have a few hours off from mommying?