Restore Gmail After Nameserver Switch

I recently moved my domain’s nameservers from GoDaddy to Hostinger so I can host the site there. I added Hostinger’s nameservers exactly as their guide shows and immediately updated the MX records on Hostinger to Google’s (Gmail) entries, yet messages to my account now bounce or sit undelivered... (Budget: ₹600 - ₹1500 INR, Jobs: DNS, GoDaddy, Linux, Technical Support, Troubleshooting, Web Hosting, Web Security)