I had sex around the time i was fertile and ovulating according to my days it was just last week but i took a pregnancy test and it came back negative?

Depends where on you: Your cycle u did the test, could have done it too soon, should repeat it a few days beofre your poeriod is due or at the time the period would start if u miss it.

Check again: Most urinary home pregnancy tests don't turn positive until around the time of expected menses, ~2 weeks after ovulation or when conceived. Thus, checking 7 days after suspected ovulation is unlikely to be positive whether or not conception took place a week earlier. Best to check again 2 weeks after suspected ovulation/conception.