Jealous

I have posted a few times about being jealous, My sister in law had her daughter and my sister was pregnant and miscarried and then was given IVF. I went to a fertility person and they said I was fat and to lose weight and zi have been written off by them. I have went into a massive health kick. I am going the gym on my days off (I work as a nurse and do long days) And I am eating extremely healthy. I was really suprised when my mum told me my sister in law was pregnant i pretended to be happy but just joked it off as i normally do and then a few weeks go by and my sister is pregnant naturally. I am so upset. Me and my husband have not used protection for 7 years, i have tried tracking and my periods are normal nothing wrong eith them and i have no signs and symptoms for pcos or anything. I have shown my emotions once to my mum about it as i was at breaking point a few months ago. I know people arent trying to rub it in my face but it feels as though they are. I want them two lines i want to be able to walk past a baby shop without snarling i want to be happy for people with that bump but i am just hella jealous.