Yes, I would make a Doc appt. in either case. If your not preg than you could have something else going on..like a STD perhaps, or a different under laying issue. Always best to get checked, better safe than sorry. :)
No one on the Internet can tell if you're pregnant. Keep testing once a week until you get AF, a positive, or reach cycle day 60. If you go 60 days without a period, it's time to see the doc. GL.
It has been 40 days since my last period