Apparently I don't care

ok first off, my wife is bi-polar. Well today she had cleaned the whole house by herself and continued to keep it clean. After that she took a bath and went to bed. Before i was about to take a shower she woke up and wanted to go to the store and get something to eat. I said ok.(it was 11:30 and i have to work at 5). Anyway I was getting ready when she started having an episode. She noticed that her clean laundry from earlier in the day had not been folded and was saying how everyone else's laundry had been folded and put away. She then asked me if I could have at least folded while she was asleep. I hadn't even noticed that the basket was there so I told just that. She started to fold it while I was all ready to go to the store and get her something sweet to eat. I also was wanting to take a shower. I asked her if she could do that later because I wanted a shower. That's when everything went downhill. She said I'm so glad that you think your shower is so important right now. We then started to argue some more and eventually she told me to take my shower. I did. We eventually went to bed (while she was still hungry) and she began to cry. I asked her why she was crying and she told me that she didn't feel that i cared about her. BTW i did thank her for cleaning the house earlier in the day. she felt like this because I didn't offer to help her with her laundry and that I just wanted to take a shower. It is very hard for me to be sentimental to her for such a small thing but i looked up stuff about bi-polar disorder and I saw that they can over dramatize stuff. We have just now got done fighting but we haven't made up and I fear that a split up is on the way. I love her to death and I do care about her but I guess thank you isn't enough. I work 6 days a week 12 hour days. She always claims that she never gets to clock out for the day as a stay at home mom. I guarantee the work i do is nowhere near as hard as taking care of 2 kids.