Is it normal that i look different every time?

I'm a girl so maybe that doesn't help but I look different like in every mirror and photo. Its so annoying! I can look skinny in one mirror and then in the photo its like I'm fatter than I thought. Then I start taking it seriously and work out ten times more then look in the mirror again and see that I'm so small and say why the hell am I killing myself working out? I look fine. It's just sucha mind f*ck I hate it. I get on the scale and I'm lighter than I thought but look fat then vice versa like what the f*ck? The fact that I love food and eating doesn't help either. I know I want to be skinny but with curves but I always realize I'm never going to get that skinny because I love eating too much and there's no way I will restrict myself. Sometimes I put on a bathing suit and look in the mirror and I look fine then when I go out I feel so chubby and bigger than everyone else then we take a picture and I turn out the smallest...again, like what the f*ck? Yes it is a self conscious issue but what is the solution ? Like I said before, I'll work out when I don't like what I see but then I see that I look fine which doesn't mean I don't have to work out but it just means maybe what I saw before doesn't exist...or does it? At the end of the day, its not fair. I just want to know what body type I am and I'll go from there.