Hello
First we will discuss about nausea and feeling of sickness .
As you mentioned in your query that you took two type of antibiotics .
Usually antibiotics develop
hyperacidity and gastritis in common , so nausea may be due to these two antibiotics .
In such type of condition I usually recommend
proton pump inhibitors like pantoprazole-d tablet twice in day .
I also prescribe antacid syrup ( better if it contains oxetacaine i.e. local
anesthetic) .
Now still pain on the right side ( lower part ), also pain in back.
This type of symptoms may be due to
salpingitis ( inflammation of salpinx or fallorian tube or in ovary on the right side ) . Diagnosis can be confirmed by
ultrasound of these organs .
Second reason of such pain may be
urinary tract infection . Get in blood for C B C ,
Serum creatinine level and urine culture and sensitivity.
The next reason of this pain may be uterus fibroid or cervix inflammation . Get in ultrasound of uterus .
As you mentioned that there is bleeding and urinary tract infection with pain in the right side , so all these symptoms are co-related .
In my opinion consult a gynecologist and get his opinion.