hi, so i'm 25 and i found a lump last monday, it feels smooth and maybe 1cm or slightly bigger, it's quite deep in so i'm unsure. i went to gp on friday (was too anxious to call sooner) and they referred me to breast clinic for tests. my appointment is tomorrow, they called and said they had a cancellation.. should i be worried about how soon that is? also what can i expect?

i'm really worried about it because i do have two lumps, one is slightly bigger and has been there for quite a few years now and i never did get that checked before finding the other one. i'm anxious but i know whatever it is i will hopefully deal with it. i'm just scared for the appointment and what they will say. i keep thinking ahead to if it is BC, the treatment etc and i know this is bad but i can't help it, everyone keeps telling me it's okay and will be nothing but i'm unsure. 

anyway, i just came to ask what should i expect at the clinic? wait times for results etc 

thanks x