Ehh it's one of those days

My fiancé and I have been trying for 4 months (I know not long) & nothing! I have pcos and my doctor told me to try for 6 months without any medicine and see what happens. I am currently trying to lose weight, but I just feel like it won't happen, my fiancé and I want a baby so bad, both of our families know we are trying to conceive. My future mother in law buys baby stuff for us all the time, and it gives me hope but it also makes me feel kinda bad because I haven't got pregnant yet :(