am I over reacting?

Hi. I need some serious advice! I got married in July of 2016 my husband and I have been trying for over a year now. Both want children. We both got checked out and everything is ok. The only thing left for me to do is an HSG just to see if there's any blockage. My husband and I still live with his parents for the meantime as our wedding was very expensive and not to mention they have a huge house. Now here's where it gets complicated, his sister, husband and three children just moved here from Australia and moved in with us. I feel like it's so over crowded and I have no privacy what so ever. I am under so much stress already with this whole TTC issue we are going through and now this. Plus she just gave birth to a gorgeous little boy so I feel so depressed. Am I in the wrong for wanting my own space and little family?