Thanks for the query.
pills can cause these types of side effects.
You once consult gynecologist and get examined. If she suggests you can go for coagulation profile once.
If everything is normal, no need to worry. Possibly the rash
will subside soon.
If the same thing repeats in future you may consider changing of the contraceptive method.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429