Hypothyroidism

I was diagnosed a little over a year ago with hypothyroidism. I’m struggling a lot with my hormones and eating right. I’m 24, 178lbs and 5’2. I love eating junk food and snacks and I’m having a hard time figuring out what I can eat and still feel satisfied. Also my boyfriend thinks my emotions are out of wack all the time and tells me to “take my hormone pills” because I forget a lot. How do any of you manage this :( it’s taken such a toll on my mental and physical being.