My Instagram DMs Are Sending Strange Links Without My Permission

So this morning I woke up to a bunch of messages from friends asking if I’m okay because they received weird links from my Instagram DM. I haven’t sent anything unusual, and when I checked my sent messages, there were links I definitely didn’t share. I changed my password right away and enabled two-factor authentication, but I’m still worried someone might have access to my account. I haven’t logged into my account from any sketchy devices or public Wi-Fi recently, and my phone doesn’t have any suspicious apps installed. I also ran a malware scan just in case. Has anyone else experienced this with Instagram? Could it be a glitch or is it almost certainly a hack? And what extra steps can I take to make sure my account is secure and stop this from happening again?