Worth buying a test or not?

I am due in 2 days for AF but making my weekly run to the store. I was planning on buying a test since I am out and won’t get out again until next Friday. BUT I just felt that my cervix is super low 😕 normally mine is extremely high to the point where Drs struggle to reach it. Does that mean I am out? Is it even worth it to buy a test? Thanks!