Ttc for rainbow baby

Anyone else getting so frustrated with trying for a baby? So everything was going well with trying up until the day before I believe I ovulated, then we both got ill and didn't have the energy to have sex, I'm so worried that I've missed my chance. I'm trying my best not to take this so seriously but after losing my son early this year I'm so desperate to have a baby here. I'm seeing so many baby announcements from other people too which is making it more difficult. Just so scared I won't get the chance to be a mum again 😢🤞🏻🙏🏻