When to take a pregnancy test?

I have been having unprotected with my bf for over a year, and ive never gotten pregnant. I was scheduled to get my period on Monday. I started spotting on my expected period start date(monday), and i usually have a normal heavy 6 day period, however this time its was 3 days and very light, reddish brown. Im also so bloated it look as though ive already gained 10 lbs, i have gas and im uncomfortably bloated and i go from (FMI) constipated to having to go ASAP... I am trying to figure out when i should take a pregnancy test...my aren't unbearably sore, and im not peeing a ton.. so maybe it is my period?? AND ive have the worst cravings lately!!Im usually very healthy but i have no appetite for healthy foods, and i just crave fast food which I NEVER EAT or have ever found appealing..