Am I wrong to be mad?

Okay so I got home the other night from work, and my father makes dinner. He was making chicken, and as we were eating my parents brought up the cruise we have planned for next year. My mom talking about how she trying to get back to a beach body and what not and this is how the conversation between my father and I go.

Him: do you plan on working out as well?

Me: I work crazy hours so right now my goal is portion control, and not over eating and getting use to small portions

( side note I'm a care giver for mentally disabled people and I'm working crazy over time and we don't exactly get a lunch break we eat and work at the same time, and my schedule is legit 3pm-3am so sleep is essential and I'm portion controling so I don't gain too much weight)

Him: you know you're fat right? * points at my plate of chicken and green beans*

Me: * is in the middle of eating my 1st actual meal of the day* umm this is my first meal of the day, all I've had was half a burrito from my dinner the other night with my girlfriend.

Him: oh I didnt know..

me: I know I'm fat I put on a few pounds since middle school. I know I'm 200 and something.

Him: well you should work out with you being so close to 300 pounds.

Mom: he's right I mean since me putting you on diet pills didnt work you need to work out again sis, you're bigger than me and I'm chunky.

Me: *akwardly pushes my food away. After 4 bites of my food and a bite of green beans.*

Later that night my mom wants to do something as a family since for half a year my dad was cheating and she thought doing as a family will help us. Well dad said he'd rather stay home because he has plans and I asked what they were and he yells saying "I planned on drinking and getting laid." So that took a hard hit knowing my father wanted to get laid and not try and rebuild a family. We eventually go see annabell and he bitches the whole time saying how he could be home. I asked him to stay because I paid for him and mom and myself and I really wanted to try and be a family again. He rolled his eyes and said I'll back you back Thursday if you lets us leave. I told him if he takes the keys and drives with alcohol In his system I'll personally call the cops. Now he's not really speaking to me again.. I feel awful here a pic of me in middle school and now

Now

Like I already can't eat in front of them with out calling me fat or making fun of my weight, they've even made fun of me for eating. I already have body issues because my family is made of twigs