Suggest Treatment For Recurrent UTI After Sexual Intercourse

im suffering from recurrent uti from 1 yr. i gt married 1 yr back.
during theses days, i observed that after 1/2/3 days of intercourse , im getting this problem. for the first two times i had severe problem. later im nt getting blood in urine, and the colour and turbidity of urine is normal. but the urge for urination, pain are severe. the most bothering thing is pain after urination. i couldnt tolerate it. a doctor told it may be honeymoon cystitis, bt i never had prolonged sex. so please help me with diagnosis. and i need a proper antibiotic and analgesic, which i could rely on during emergency