Hi, 
I am sorry for the painful abdomen and lower back you are experiencing. 
Monthly bleeding together with bad cold coughing is causing the pain in your abdomen and lower back. 
I advise to take OTC pain-killers (like 
ibuprofen or mephenamic acid). 
For the bad cold, should take:
- cold meds you find OTC
- increase fluids intake especially water, juice, tea, soups
- Apply vapour rub on your chest
- aerosol therapy can help 
- take anti-
histamine like 
loratadine for the inflammation
- take 
mucolytic is productive cough (e.g carbocystein)
If this is not improving your symptoms, should consult further with your physician and run further tests like urine analysis, abdominal 
ultrasound to rule out infection or any other genital problem (ovary cysts). 
Wish fast recovery.