Can someone shed some light for me. I’m 32 years old.

4 days ago I found a small hard smooth lump in my left breast not far away from my nipple. It doesn’t move when I try to move it.

i went to see my doctor as she referred me under the two week urgency - she said I would have a ultrasound. 

I am 10 weeks pregnant with 2 other children. I’m absolutely petrified it’s cancerous... the fact it does not move is concerning. I have to wait till Monday and I’m going out of my mind with worry- I can’t leave the house and I’m just sitting around with a black cloud hanging over me. When I received the referral letter it said “suspected breast cancer” which has totally frightened me. I keep crying and thinking the worst. 

Does anyone know know what I can expect from a appointment- will I get answers straight away 

will I have longer to wait - I cannot worry my family with this