TTC after miscarriage - sister also TTC

Hey all,

So last year we lost at baby early just days before Christmas Day, at around the same time my sister got her tubes untied and is TTC as well. She recently showed me a positive pregnancy test but started bleeding 2 days later making me think it was a chemical pregnancy :( anyways we were discussing everything & she asked me if we were trying again, the thing is that we are but after the miscarriage we don’t want anyone knowing that we’re trying as I don’t want to be asked all the time if we’re pregnant. I just think that she’s going to be upset if I get pregnant before her 😕 my partner and I just are worried about a second miscarriage but I fee awful telling my family (both her & my mum) that we aren’t trying when we are & worry that she’s going to be upset if I get pregnant before her this month (ovulating now) .... not sure what I’m wanting to have someone say but just needed it off my chest, I love her & want her to have another baby! She has an 18 & 20 yr old.