Someone help me please! Why are my pics uploading small & how do I fix it???

Marlei Mae • Happily Engaged✨Mommy to a little girl✨Baby #2 on the way 💙

I want to share my pregnancy announcement photo but I want it to be the right size. It’s frustrating me lol! Any idea on how to fix this?? I’ll post my pregnancy test photo as an example of what’s happening. Thanks in advance!! 😊