Thank for asking to HCM
I really appreciate your concern, looking to the history given here, the chances of intestinal infection is likely, if I would be treating physician of this case then I would treat this case with the following medicine,
1) Tab Metronidazole
400 mg twice in day for five days
2) Tab Doxycycline 100 mg once in day for 10 days
while eating take care be patience at this time, no talking no more junk food hope this information helps you, have a nice day.