Possible pregnancy ?

My menstrual cycle was suppose to begin August 30th but it did not. 5 days passed and i went to have a blood test done September 4th because i was late, due to my experience that day, long story but ima skip over it. I got a test done that day and sent out to see if I was pregnant. But then my period came on that same night. Intensive pain, started light but became heavy. I got the results from my doctor that Tuesday saying that I am. Couldn’t get the results Monday due to Labor Day. Even though my cycle happened, I still made an appointment with my OB which was set 6 weeks from the day I missed my period. It’s now October 1st the day my cycle was suppose to start but I started spotting and cramping intensively a couple days ago but it begin to get a lil heavier. I’m so confused. I’ve read that blood test hardly ever provide false positives and I even spoke with women who were once pregnant to see what they’ve experienced but I don’t know how I feel about my menstrual cycle still coming on. Any ideas?..