hey, you're not being stupid. you're being very concious about what your body does because you're trying to conceive. best of luck
i'm so sorry about your bfn i was the same as yourself though i never tested. I got my AF today 3 days early i'm gutted but one thing i will say no matter how much i want to i never test until after i'm late. I used to test when i first started trying over a year ago and found it was more heartache than i needed. Hope everything work's out for you and you get your BFP soon
its so frustrating, going to forget about getting pregnant concetrate on losing weight and living life and see what happens the heartache of it all is sometimes to much to cope with