Found a lump below my nipple

Hello, 

I wanted to see if anyone has experienced what I'm experiencing?

Ive just turnt 30 and towards the end of 2020 I noticed a pea size lump in my breast just below my nipple bottom of my breast area. I gave birth to my son last July so my breasts have changed slightly 

I went to gp in December and she said I have lumpy breasts felt like tissue and to keep and eye for changes. I also have psoriasis and around the areola has been dry for sometime now I'm thinking is that a sign I have something like cancer that I've missed for my psoriasis as it's just on that breast with the lump also they have felt more tender lately too . I saw a different gp this week and she said she'll refer me to breast clinic for scan and biopsy to be safe but said she's thinks it's unlikely. I'm so nervous  all I can think about is this and worrying looking online. X