Thank you for your question,
I’m Dr. Saha and I’ll try to help you.
How many times did you pass stool?
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Do you have fever, nausea or any other symptoms?
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I would suggest to take an examination by doctor in ER or urgent care.
There can be an infection.
A bacterial infection is possible.
Cramping, mucus, blood in stool are common in this condition.
A stool test, culture, blood counts should be taken.
If the bleeding continues, there can be blood loss, dehydration. So it would be helpful if you take an examination by doctor tonight.
You can need antibiotic for it.
Please try to take plenty of fluid, oral rehydration solution.
Though you have started doxycycline, but stool test will help to determine which one would be effective here.
If there’s anything else I can do, please let me know
Please feel free to ask, if you have any further query.