Hi,
The morning after pill is not known to cause such a problem.
Surely this looks more to be an intestinal infection.
Hence I would advise you the following:
Consult your Doctor for clinical evaluation, per-
rectal examination to see any local cause like hemorrhoids that caused the blood in
diarrhea.
Send sample of stool and blood for lab.
All these will give an indication about the possible cause.
You may be started on an antibiotic,
metronidazole and probiotics if there is any evidence of an intestinal infection.
In the meanwhile take plenty of oral fluids, electrolyte solution, use boiled for 20 minutes and cooled water.
Take care.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. T Chandrakant, ENT & General Surgeon