Taking multiple pregnancy tests throughout 1st trimester

So I found out I am pregnant and am about 5wks along. I was in pregnant in April of 2013 and lost the baby at 7 was ( of course we didn't find out until my 12 wi checkup) so I'm a little paranoid that  this pregnancy will end the same way. Trying to keep positive thoughts. I want to know, if I take a pregnancy test to verify that I am still pregnant, will it come up negative if I've lost the baby? I'm unsure how that works and when the hormone levels go down.