Doctor says to wait 4 weeks ?

Hi everyone I have recently felt a hard fixed lump in my right breast directly under the skin no other symptoms I’m 28 years old and I have no immediate family that have had bc … I went to the doctors today and she felt lump but says because of my age it’s unlikely to be bad news do to go back in 4 weeks by that point il literally be going crazy can I push for a referral or am I stupid is she right in that I should wait xxx

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Thankyou for your reply well my lump is still there but I do think it’s gone that bit smaller ? Can they go smaller what fibrodonema I think iv spelt it right could I have that ? Xxx