Could I be pregnant and not know/not test positive?

So first off, irregular periods are not completely out of the ordinary for me. Very sporadic, heavy, and painful, but this past year they’ve been pretty on spot.

I got off Eluryng in June and poorly took the pill until august, where I had a lot of unusual bleeding. I have been off birth control since.

My last period was October 11-15, and I have not had one since then. My boyfriend and I aren’t using protection, we agreed that we’re in a good place/time in our life if we were to get pregnant, but we’re not actively trying to, though he does finish in me quite a bit. I’ve tested negative every time I test. I’ve noticed I’m becoming rounder almost, or could just be gaining weight (I’m thicker as it is so I could just be gaining lol)

No pregnancy symptoms other than intense mood swings.

Yes I am going to see the doctor but I just want to know if anyone else has experienced this and it turned out to be that they were pregnant. Thank you!