Found a lump in breast

Hi

I found a lump last Friday and have an appt at breast clinic on 31st. I'm 46 years old

Really strong family history of breast cancer (mum, 2 maternal aunts and 2 first cousins)..so I'm pretty freaked out at the moment.

Started feeling some pain around the nipple too. Not sure if I'm imagining it!

Can someone tell me what to expect at the clinic and how quickly I will have tests and get results? 

Thank you