So me and my partner are trying for our second child.. I was on the drop injection from January to…

So me and my partner are trying for our second child.. I was on the drop injection from January to August 2015 with no periods then came off it in August .. Got my first period since coming off it a few months back then I was getting them every 2 weeks.. I have been tracking them but I have noticed I haven't had a period for just over a month now.. I'm tired quite abit and had abit of discomfit with my tummy and back what are the chances I could be pregnant?