Actually you are not in the minority. Most women with UC have constipation-based UC. I had it for 10 years before the disease switched to diarrhea-based UC.
If you can't eat more fruits and vegetables to get things moving naturally I don't think taking Miralex nightly will cause you any harm.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free