Any nurses or drs on here?

Need some help! Today I woke up and felt like the room was spinning and I was so dizzy. When I finally could stand up I felt like I was gonna pass out and had to lie back down. My bp is 101/61 although I don’t kno what it normally is. But I just feel off. What could be the cause of all this? I just had my period this past week and even it was different than normal. I couldn’t miss work so I can’t go to the dr yet!