For the last few days I've been feeling nauseus and tired. I had a miscarriage in June at 11 weeks and felt similar to how I do now before I did my test. But I have really long irregular cycles (35-37 days as an average it has hit 47 once) and going by my average I'm not due for another 2 weeks, is it a good idea to do a pregnancy test or will it not show anything yet?