Increased hunger in 2nd trimester?

I'll be 18 weeks on Monday but damn... My hunger has increased like no other the past week. It's insane! I'll eat dinner and then 15 minutes later want something else. Wtf?! I eat so healthy 98% of time so it's not empty carbs or foods with loads of fillers that just pass through, etc. I've never been like this at any point in my life where I want to keep eating. And i wasn't like this my first pregnancy either. Any suggestions? It's driving me nuts!!