welcome to healthcaremagic
there is no direct relation for masturbation
for your periods to be late, Over-masturbation internally or externally may causes urinary incontinence
. Since the female urethra is very short, external masturbation on the clitoris
can irritate the first inch of the urethral nerves.
you are feeling your period late it may be hormonal
if it continue please consult your doctor for hormonal therapy