Opinions..

So On September 20th I had a light period for 3 days.. my periods are 5 days every single month for the last 4 years. I didn't need or put in my menstrual cup at all the entire time.. just wiped the blood away when I went to the bathroom each time. Had bad cramps sore boobs migraines the whole 9 yards of pms symptoms.. they were worse than the actual period itself 🙄.. so fast foreword to the day it stopped. End of day 3. Just gone. Then day 4 very very light spotting at night time for about 2 hours.. and again just gone. So I tested every day the following 5 days and got all negative tests results.. I was concerned because it was an odd period. I'm still having very sore breasts I'm dizzy I have hot flashes.. idk could I be pregnant? Should I go to the dr and do a blood test?