Pregnancy question

Hey there-
Debating going on triz compounded for a couple months to get off stubborn baby weight from my second as well as extreme inflammation in general. I i’ve tried absolutely everything naturally to lose this weight, but due to circumstances out of my control I can’t. I do not want to get pregnant at my current weight (5’9 and 175lbs) because I don’t want to gain 30 to 40 pounds at this weight and I am truthfully having trouble getting pregnant. I feel like it’s the weight and inflammation. I’m debating going on the tirz for a couple months and then weaning off, giving myself 2 months then start trying again. Has anyone done this? I feel like everything I’m reading is saying you should really do it for a full year and then wean off for two months before trying..