TTC Sadness

I am supposed to get my AF on Friday/Saturday and I have been having AF symptoms but also could be early pregnancy symptoms and I'm really sad because I know deep down I will get a BFN due to my weight because I feel that's one big factor why the husband and I haven't got pregnant yet. I really felt like this month was the month we got pregnant but I guess instead of getting my hopes up, I'm just preparing myself for a BFN and I just feel so sad. I feel I should lose weight and hope that helps but it is hard to stay consistent with my job and everything else.