I Am 19 Years Old Female I Have Been Trying

I am 19 years old female i have been trying to concieve my last period was on the 10th of august and finished on the 14th i am due for my period today 7th of september i started bleeding 4 days 3rd of september before my due period i have been getting mild cramps like period cramps but i end up going to the toilet to do a number 2 cramps