Well I dont know if you would get all those symptoms straight away I mean I'm 20 weeks and not had heartburn, and the baby at this point wouldn't be big enough to have any sort of impact on your eating habits, apart from the nausea which would make u stop eating not eat more, have you missed your period yet? If not I wouldn't test if you are pregnant and not missed your period it might be too early to detect
to me it sunds like your pregnant but that test should confirm it good luck