Diverticulitis with multiple antibiotic allergies

[Meowmy]

I am a 70 year old female with recurrent simple diverticulitis. I have had about 8-10 episodes, treated successfully with cipro and flagyl. In July 2014, I got hives on day 6 of treatment. Medication was stopped but dvt continued to improve. I am also allergic to penicillin (erythema nodosum) and clindomyecin (rash). I was advised to have a sigmoid colectomy to reduce episodes of dvt. I had the surgery in February 2015. I am currently on a river cruise in Europe. I had a flare of dvt which presented as it always does four days ago. I went to a doctor at St. Marien Hospital in Cologne who confirmed the diagnosis and prescribed 200mg of doxycycline per day for 10 days. At the end of the 2nd day, I developed a full body rash. Smallish, flattish red bumps almost connected. I was in the sun that day with 50 sunscreen, fully covered skin and hat. We will be in the port of Miltenberg, Germany at 2 pm for 4 hours. Tomorrow I will be in Wertheim. What should I do?