Can you be pregnant with a “period”

I know this might come off as a stupid question but I am so lost. I was one day late on my “period” but the night before I spotted brown (only when I wipe). The next day I got a more pink red flow going where I required to wear a pad. I bled for two days a normal lighter than usual flow but today I am spotting again. My menstrual cycle has always been 7 days long with no spotting nor light flow. But now, it’s only 3 days. I tested on Saturday (day 1 of “period) and a light faint line appeared. I’m confused right now since I’ve been with nausea and even vomited on Sunday. My breasts hurt and feel heavy and I lost taste in my food intake. Hubby thinks I might be but not sure since I’m bleeding. Could it be pregnancy or a more serious matter in my reproductive system?