Well , i know you are worried since you think the possibility of a pregnancy
Well i cant deny the chances but if at all so, you can go for a medical abortion
right till 9 weeks of pregnancy safely. So wait for two weeks more and then go for a ultrasonography
of pelvis to confirm intrauterine pregnancy,and if so you can go for a medical termination safely.
Alternately you can redo the urine kit test after one week and if you are not having any pelvic pain
, you can go for medical termination also,if at all it comes positive.
I will advice you the former one and to keep patience, but i think you need to be careful henceforth.
good luck. take care.bye