again, they can't just reject the application because there is a 6 week gap in your cohabitation. they need to either a) call you in for an interview to explain and made a decision or b) request more proof of cohabitation and documentation that explains the gap and make a decision and/or call an interview.
for all you know, this isn't even an issue in the visa officer's mind. we tend to criticize and nitpick our own applications without realizing that the things we "see" and "think" are red flags generally are not red flags in the eyes of the officer. stop assuming you know what the officer will "think" or "feel" about your application. you don't.
Your application was submitted in april, that's hard 2 months ago. relax. there will be a lot of waiting in your future, and at this point, no news is good news. wondering about all the "what ifs" will drive you crazy and does not do any good. think about getting approved and moving to canada rather than all the reasons why you should be rejected.
