Hi trying - I'm 5'4", weight about 207, give or take. Never have has my doctor or specialist told me to be concerned about this.
Some people with EDs (eating disorders), whether it's anorexia, bulimia, or bingeing, may have a problem with their cycles (for example, some anorexics get to a point where they lose their periods completely), but unless you have been told this is an issue for you, don't be worried about it.
I was actually terrified to see the specialist for the first time, because that's what I was expecting to hear, "Well no wonder you can't get pregnant, you're so FAT!" but no - my weight never came up in conversation at all.
I totally get your concern, but hope this helps to allay some of your fears

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Most important? Just be healthy - no matter WHAT your size or weight

. Thinking fertile thoughts for you...