Late period

Hey ladies, so I’m 17 and sexually active with my boyfriend of 2 years. I am irregular but always get my period somewhere between the 24th and 31st. It is April second and I’m concerned because I never am late into the next month. My boobs hurt on and off but when I PMS I’m pretty sure they hurt all the time. I took a test and it came out negative but I’m worried I took it too soon. The form of birth control I used was a condom. Advice?