Suggest Remedy For Irregular Periods

my name is swetha and iam not getting my period regularly for this month and iam feeling drowsy in the morning and iam passing heavy urine daily comparing to the regular days i have a doubt that iam pregnant if it is conform how can i destroy it by medicines please clear my doubt tell me any medicine name that stops my pregnancy and also tell me how conform it first and my age is 21 weight is 57