Okay, so I THINK I may be pregnant

I'm just guessing at this stage. I don't think I am, but my coworker thinks there is a big possibility. From what I remember, my last period was some time in sept (early to mid).
Dh and I dtd on sept 27th (i remember because it was after my friend's wedding

). I missed my period in October. And I still haven't gotten it.
I remember feeling dizzy a couple weeks ago, and I couldn't shake it off. Then my coworker was telling me that whenever she was pregnant, the first sign she got was feeling dizzy. And I do recall just before I found out I was pregnant with aidan, I was dizzy as well
I don't feel anything else though. The dizziness seems to have gone. My breasts arent sore. But according to my coworker, she said every pregnancy is different. If I am, it would've been an "accident", because I definitely don't know if I want another

I'm gonna take a test tomorrow morning.
Any of you was pregnant but didn't even have any signs and didn't even know until you realize your period was late??