Oh we LATE late

Ok ladies I am 7months postpartum & have been decently regular give or take a few days well this month i have yet to have had my period I was due on the 13th to get it! 😅 I had two times ina week of each other where I felt dizzy, weak, and so tired I thought I was going to pass out on top of having extremely bad stomach pain. I’ve taken an at home test it was negative will repeat again, but do ya think it’s time to call the doctor? 🤣 y’all think I’m pregnant or not? Mind you the first time around the only symptom I had was that I was tired and bloated and didn’t find out until I was well over two weeks late lol