lose weight??

okay, so a few questions...

i am 5’8” and roughly 195-205. would this cause infertility because i’m overweight?

also, i am very irregular but usually have my period every month. i’ve gone two months without a period but i’ve taken two pregnancy tests and they were both negative. i have a doctors appointment on november 7th but i was wondering if anyone knew maybe why i haven’t had my period?

another thing, what are some tips on getting pregnant? we’ve been trying for a year and nothing has happened. it’s really starting to make me sad.