Should I cut my hair short again?

So my mom and I are going to get our hair cut next week and I'm torn between just getting a trim or cutting it up to my shoulders again.

My long hair is pretty and it's taken like 2, almost 3 years to get this long but it gets in the way SO MUCH. I didn't intend on growing it out, I just haven't had it cut in that long lol. I shed SO BAD. Like my hair is everywhere.

I love my short hair, it's easy to deal with, it doesn't get frizzy, I don't shed so much BUT there's one thing. My dad always told me that short hair makes me look fat lol. I know I shouldn't care what he says, but I believe him at this point, idc how he feels. He's a jerk lol.

I've gained alot of weight since having my son, so I'm worried about getting it cut and looking even bigger and being more insecure. I promise I'm trying to lose weight lol.

So should I cut it anyway, or just trim it? I do like my long hair, it's just impractical at the moment.

Keep in mind, I was about 50 pounds smaller in the second set of pictures so my face is fatter now lol