More hungry when I eat

Pineapples

So for the last few months I have been under a lot of stress and well due to lack of time I have skipped meals throughout the day and pig out at night hence gaining most of the pounds I had lost.

As of Sunday I set myself to get back on track and trying to eat at least 5 times a day. I have successful achieved that for the last 3 days but i find myself hungrier then when i wasn't eating through out the day. Any ideas what could be causing this?