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. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
Then you won't be able to get the certificate back in a usable form. The cert itself is public information, and is logged in certificate transparency databases. But the private key is, well, private--you had the only copy of that. If you destroyed it without having a backup, nobody else can get it for you, and that means the cert you can download will be worthless for you.
It doesn't look like you've hit a rate limit on cert issuance; as Mike said, you've only issued two within the past week and you're allowed five. But there are other rate limits, and the one you may have hit is on failed authorizations (which resets in an hour).