Hi Josie28,
I think we sometimes disappoint ourselves when we raise our expectations too high too quickly. It is OK to have crummy days and cravings at this point...and at any point, really.
I suspect that you've spent a lot of time and energy fighting those feelings. Maybe try just accepting them. Breathe in what it feels like to want a cigarette really badly and really feel all the discomfort that goes with that. Then breathe it out. If there is more of that feeling, keep on taking it in, feeling it, and observing it. Notice what it physically feels like, what it reminds you of, and what thoughts seem to go with it. This exercise can help with a few things: 1) It gives you something to focus on instead of getting all panicked/ frustrated/ defeated/ etc. over the feeling. 2) It helps you to better understand your own feelings and triggers.
Even now, I occasionally need to use this tool. I've realized at different points and in different ways how so many of my "craves" really weren't about cigarettes at all. Instead, they were about negative emotions that I didn't want to experience and had been able to conceal by smoking in the past. Lately, the uncomfortable feeling that's been popping up a lot for me is sadness, and I'm learning to just accept it and cry instead of smoking. In the past, I would have regarded those tears as signs of weakness, but I'm learning that this is actually how normal, healthy people do it.
...This whole quitting business certainly is a journey. Hang in there!