Chest pain

[coquis224]

Hello I'm 16 weeks but I keep having chest pain like right under my upper boob I guess more towards the middle. It's mostly my right side which makes me think it's not my heart... I'm also paranoid about cancer since my mom died last october of Stage 4 Breast Cancer at 49. Dr has given me EKG's and I'm fine supposedly. Anyone else have this?

Also my breasts are small and haven't gotten bigger so IDK what this is.