could I be pregnant?

About a week later I thought I got what was my period (may have been spotting) and didn't worry about it.

Now I'm having frequent dizziness, headaches, and awful cramping a few times throughout the day for the past week. My breasts are sore and Im feeling bloated. I have had crazy mood swings (highs and lows) and I've been very tired. These symptoms are not my typical PMS symptoms and I'm nervous, but I'm not sure if I need to take a pregnancy test. This is also very scary because my boyfriend and I broke up 2 weeks ago and he would most likely not care and just be very angry with me.