My hamsters mated 4 days ago and the female was in heat, will she definitely be pregnant?

4 days ago my hamsters Will and Elizabeth mated and Elizabeth was in heat, does this mean she will definitely be pregnant? Serious answers only please cos I really need to know.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).