Venting. Life situation and Infertility

WARNING-LONG

About six months ago, my significant and I moved to his mom's basement space. This moved was so we can safe money and pay all our debts before buying a house. We have been trying to be parents for over a year with no success. We are both fairly young. 27 and 33. Come to find out that we both have infertility issues. My OBGYN referred me to a fertility clinic. Now, the process with fertility clinics can take forever and it might not even be successful. Yesterday, after 3 months we had our embryo transfer. During the process of stims, restrictions of what I can do and not do, multiple doctors visit a week and the stress of living at his moms and the fact that I really, really don't like the lady anymore, I have been questioning everything. From our relationship, to our future family together and most and foremost living in someone else's home. Small background of his mom. She is a nice lady but she has no consideration at all, have no boundaries of personal space and likes to know everything and anything that is happening. Since we are in the basement, the laundry room is there as well. She does laundry for 3 days straight at late hours such as 9 or 10PM. She comes in our room without asking permission. She is always and I mean always asking things like, where are you guys going, what are you guys doing, are you working today, why didn't you tell me you were going out, are you going to shower (when one of us have a towel at hand . Its common sense) she will ask this particular question every single. Anyways, I know they are stupid questions but when it's on repeat every day, multiple time it become extremely annoying. Now, at all this I'm getting extremely aggravated. I am a private person and I hate being question. We both work. Pay rent. Buy our own food, toiletries, cleaning products, etc. We dont take or use any of her stuff. I just want to say " Stop being so fucking noisy and don't even talk to me. You know what? Don't even look at me". In all this, my S.O has mentioned a couple of things to her. Like, stop asking her or us questions blah blah blah. They have a great relationship and I don't want to break that but I believe I am at my breaking point. Now, with hopefully a baby on the way( we both are really happy about that and I know we will be great parents). I am just tired on living under this lady's roof and feeling that we everything going, my S.O is not completely supportive or maybe don't understand the level of my frustration. Ugh

Sorry guys. Its extremely long. I just had to vent.