Seems many of us feel that gonna/gotta/wanna are okay spoken but not so okay when written. How does this apply to "gotten?" As in "I haven't gotten sick in a long time, but now I don't feel so good."

It strikes me as a little different from the "going to" vs. "gonna" distinction, as the tense it suggests is a bit different from simply "got." But I could just say "I haven't been sick..." Anyway - whatcha think?