Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
For future reference: Apache can be reloaded too. In that case, it will restart the main process instantly, spawn "fresh" child processes when needed and will stop the "old" child processes only when there are no connections left. That way there's no downtime or other issues with current users of your site.