Trying for one more

Gloria
ok had intercourse the day of ovulation and the next 2 days after August 8,9,and 10th. ..was supposed to have period the 21st or 22nd..well Saturday late afternoon the 22nd had a light pink when wiped and maybe one more time that evening and yesterday morning barely anything...my breasts have been extremely sore and have had cramps like was going to start but nothing..this morning a barely there pink when wiped..usually i would have had a heavy flow ...its still happening on and off when should i test or is it possible to spot lightly for a few days before actual period ??this is new to me