Because you have irregular cycles, you can take a pregnancy test whenever you want. The symptoms and signs you’ve mentioned mean very little. Only a pregnancy test can tell confirm a pregnancy. A pregnancy test is valid only after the first 10 days of a possible conception. Conception occurs soon after ovulation and ovulation happens 14 days before an expected menstruation. Irregular cycles/periodscreate an environment in which it is nearly impossible to predict ovulation using the calendar method. You can, however, use the method of measuring basal temperature every morning. As ovulation occurs, the body temperature increases a little. It is during this time that you should have sexual intercourse if you want to conceive. A woman with irregular cycles who wishes to become pregnant must first determine whether she is ovulating or not! You can take this first step and go to your gynecologist to find out!