What a tool! You need to drop an egg to get pg, and you can't do that on your own... and often the weight is a symptom of PCOS not the cause.
I don't want to tell you what to do, bc I know you've come to a place of accepting it's over, but is there another gyno you can see? I know you can't afford a FS (either can we) but are there other options to change to someone else. So you have done 4 or 6 cycles of clomid? That's a 1/3 or 1/2 success rate. if you didn't ovulate once, I'd understand more. Even if she said ok, it has worked, so we are going to do 3 months of 100mg, give it a rest for a month or two, then do another 3.