Sore boobs... can you help?

I am almost 6 weeks pregnant but I noticed that my boobs start to loosen a bit. My bra is usually so tight but today feels a bit different. I haven’t had any cramps, bleeding, etc.. but I started to have sore boobs since like a few days after ovulation. So that started early.

Do you think it’s normal? I am kinda scared as I had a MC last year in July. I’ve prayed so hard for this baby...