Everyone knows. I document my journey on facebook. I've talked about my hyperplasia and the struggle to lose weight; as well as the struggle with infertility. I talk about my doc visits if it is important or news changes. I didn't want to announce as soon as I did but that sort of spiraled out of control. I'm not opposed to announcing before 12 weeks but I barely found out before my sis told her work (which I used to work at so everyone knew me and my story) and when I told my dad my mom figured it was open season.
My way of announcing was posting a pic that said, "I'm so crafty I make people." (I am a craft person so it suited me). and I waited to see how long people took to see it.
when I started to miscarry I didn't say anything until it was confirmed. I did a big post on facebook for it, mainly so that I didn't have to keep telling people individually. Which I did have to do a bit. I started talking to an old friend but we didn't friend each other on facebook. We went months again without talking and just last month she messaged me asking how my pregnancy was. It was hard to have to tell her.
After the miscarriage I did quiet down. There wasn't a lot more to say. But when we thought we had to do IUI I updated and I updated when we found out we didn't but chose to anyway and how I have to get my bmi back down. Now I post my daily workouts as that is my focus until we start up again.
I think when people know, especially if there are fertility issues, they tend to be more sensitive. They won't always tell you they are pregnant (like my ex coworker was going to tell me the day I announced my miscarriage but she kept quiet. I ended up figuring it out by pages she liked lol). Some understand more why you don't want to go to a baby shower, or aren't planning a vacation, or why you just can't be around their kids. Or if you were to be bump buddies. If you don't speak up people aren't aware of the pain you may be going through or the struggle.
Sure you are going to get all kinds of crap like "relax and it will happen." I don't know how many times I got this and how many times I had to explain that I didn't ovulate on my own and no amount of relaxing is just going to make that happen. Or explain to them that I wasn't stressed out. They equate your tracking and charting to stress.
but it's all individual and personal. In ways, particularly for straight couples, it's talking about your sex life. I never went into the nitty gritty of when I was ovulating. But I posted if it was negative. There are a few people who know the nitty gritty stuff, my mom, my sisters, my 2 best friends (1 guy and 1 girl).
sending you hugs and lots of baby dust for next cycle! 
