Feeling stuck

Last men was Nov 22 I was ovulating the last time we had unprotected sex which was Dec 7. The start date of my period was suppose to be dec 23 the week prior my suppose period I was feeling morning sickness , tired and small food craving. I took two test Dec 24 which had a faint positives. I’ve been testing every since but it keeps showing neg even on digital. On day 2 of missed period all my symptoms stopped. In the middle of the year I had a chemical pregnancy & I’m scared it’s happened again. I have my dr appt scheduled for next week.