I need opinions about what my friend said :/

So I am 7 1/2 weeks pregnant. And (yes I know it's not the baby yet) but it is my third and I am so bloated that I can't button my pants anymore. I'm sure I get ugly faces for going to the store in pjs all the time. I was at kid to kid with my friend and saw some cheap maternity pants for $5 so I thought "what the heck" mine as well be comfy but then she looked at me all weird and said "what is something happens to the baby? And you have maternity clothes already?" My heart instantly shattered as I have has miscarriages before. And I put them back. Now I don't know what to do. I don't want to not buy maternity clothes like I'm expecting something bad to happen but I don't want to jinx myself by buying to early either :/ I've already heard the heart beat and saw the baby what are my chances of me loosing the baby?? :/