Is it safe to get breast augmentation replacement one week after initial surgery?

I had a BA last Wednesday in which the PS used a 375cc mp implant after I had chosen hp. She claimed to not have been told about it by the two employees I told. She then told me to come back this following Wednesday to switch the moderate for the high profile. Is this safe to do a week apart? I am in constant pain, tired, and very stressed. I am not confident or very comfortable now with the surgical team. I asked for more time and she refused and said there were no risks. What do I do?