Help!

Hi! My partner and I have been trying for our first baby since April. My last period was on October 22, and on the 7th and 8th I had a positive ovulation test. My cycle has always been 28 days, except this month. On November 18 I had some bleeding with bright red blood, which stopped after just one panty liner. I tested negative that evening. Could that have been implantation bleeding, meaning I should wait a bit longer to test? I don’t have typical period symptoms, just a bloated, gurgly tummy and sometimes a bit of nausea. According to an online calculator, I should be a day late tomorrow. Can anyone help me??