Eptopic pregnancy symptoms?

Nervous and overthinking every twinge and pain I have. Has anyone previously experienced an eptopic pregnancy? Do you mind sharing your symptoms? When did you find out?

I’ve been having back pain. Occasional neck soreness. Cramping. I also carry around my 25lb son a lot, so, not sure if is that, or eptopic symptoms.

Currently 5w2d. Thanks in advance mamas.