Could spotting after Unwanted 72 be withdrawal bleeding?

When periods are delayed and prolactin levels are at 28 ng/mL, it may be due to a condition called hyperprolactinemia, which is characterized by high levels of prolactin in the blood. Symptoms can include irregular periods and milky discharge from the breasts. This condition can be caused by stress, certain medications, or a benign tumor on the pituitary gland. Treatment usually involves medication or addressing the underlying cause.

It's possible you have a URINARY TRACT infection and a rash.
UTIs can cause pain in lower abdomen..... Get tested!! and treated.
RASH could be unrelated or a side effect of medication.
Consult with a doctor for proper diagnosis and treatment.

A painful cyst contained between the anus and vaginal opening that brings discomfort should be treated by a medical specialist. This may point at an abscess or infection and should be immediately attended to by a gynecologist or colorectal surgeon. Moreover, a doctor should also be consulted and the causes for regular stool or hemorrhoids investigated.

if you have at risk sex close to your period, delay or wait.
There is an option for emergency contraception pills, however they are not 100%.
Use condoms to avoid pregnancy and getting sexually transmitted infections.
Consult a physician for further advice and routine follow-up.s

Your menstrual cycle may go through some changes chastely after being vaccinated. The vaccine is known to be able to modify the menstrual cycle at times, but it's no cause for anxiety. Over time, your periods will return to when they were on their own. Meanwhile, always be healthy, be hydrated, and get enough sleep. 

External hemorrhoids or piles can occur during or after pregnancy due to the increased pressure on the rectal veins and hormonal changes. Hemorrhoids often improve with time and self-care measures such as a high-fiber diet, hydration, and creams.