no youhould use condom untl full status is known as she could still have std and be hiv - . if she was not at risk she would not have tested hiv status so protect yourself untill 100 % sure x x
people are most worried about HIV because it is what you hear of the most.
Of course, it is one to worry about for sure, but there are MANY diseases you have to be careful of.
My advice, use a condom until preferably you know she has tested negative for other diseases (chlaymidia, Herpes, syphylis, etc.) or secondary but less recommended go by what she tells you over time. Ask direct if she has ever had an STD...most likely she will tell you the truth if a longer time girlfriend and if she hasn't been with anyone recently.
As a precaution...it may be a good idea for you to have a screen as well, just in case you don't know you have something to give to her either.
But yes, personally I would wear a condom...and maybe even bring up the subject in talk first. Even if she has an STD , and tells you, there is lots of information how how best to be careful yourself so you don't have to worry as much.
Hope this helps.