Hi, this morning i was at work and went to the bathroom when i wiped it looked like i had passed a mucus plug... my last period was july 30th to august 2nd just over 2 weeks ago, so i'm a little concerned of what this may be?

No worries: Passing increased amounts of vaginal mucous is usually not a sign of anything serious. Given the timing of ~2 weeks after your last period it could be due of ovulation. If you have other symptoms, such as vaginal itching, burning, or a bad smell then it could be due to a vaginal infection (not STI). If you have had unprotected sex, you should be tested for sexually transmitted infection (STI).