Lactating Mother, Wanting To Postpone Cycles. Can I Use Primolut ?

Hi My name is AAAAA n I m a lactating mother. I want to postpone my periods by abt a week from tomorrow . Today is my 26th day n I generally get my periods on the 28th r 29th day of m.cycle . I want to know if there is any other tablet apart from primolut n to postpone periods bcos I have heard that primolut n is not advised during lactation . So sorry I m not ready to pay so much for an answer. Thank u. Please help.