Yes, Lyme may have caused the inflammation in your colon that was diagnosed as UC. But it is also possible that you happen to have both Lyme and UC.
Artificial and other food additives can certainly aggravate the colon - things like sulfite & other preservatives, artificial flavors/colors, carageenan, etc.
The anxiety was possibly from a herx...Lyme is known to cause anxiety and often herxes consist of Lyme symptoms that are more intense than our usual symptoms (and herxes can also bring on symptoms we didn't have before).
Yes, I too believe the colon can be healed. Don't give up - there are lots of different things out there for Lyme, it is just a matter of finding what will work for you specifically.
Chronic Lyme Disease, Chronic Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, etc.; G-Tube; Currently weaning off TPN.
Meds: Pulmicort, IV Doxycycline, Heparin (to flush PICC line), Claritin, Singulair, Domperidone, Colloidal Silver (topically & nasally), probiotics, Liver support herbs, Ailanthus, digestive enzymes, homeopathy.