I would take another test. I always take a test whenever something feels off. I was on the depo shot for five years so I had no sigm to say "hey! you're pregnant". I recemtly went to pill form (due to five years being the limit for depo) finally had two normal periods and then nothing. had the slightest doubt. turns out that I'm 6+ weeks, with three tests. its always better to be safe thansorry. eespecially in my case because I'm a smoker and have a very high caffeine intake, along with many medications.
good luck!
No I haven't had a period in 15+weeks xx
Have you had a period since you took the test?