Baby 2 after Chemical

I had a chemical pregnancy back in September and it was pretty upsetting. At the same time I kind of had a feeling it wasn't going to pan out and knew the baby would be back. My period is due Saturday (12/12) but last week I was feeling really sick so I took a test. It's been positive for about a week now. I'm super nervous it's going to be another chemical. But the positive lines are way stronger than last time, and I have been really sick (tired unreasonably and nauseous all the time). My last period was much lighter and shorter than usual so I'm wonder if I could be further along and that period was fluke. My first Dr apt. Is 12/28 and going for a blood test next week once my period is officially late or non existent. Just looking for some support and baby dust! Thanks all!