Hi mama! So if I'm getting this right, your period came May 21, then you had sex June 16, and your period came again June 21, if that's the case, it's unlikely you got pregnant from that June encounter since your cycle seems pretty regular and close together, pero best talaga to take a pregnancy test or check with your doctor to be sure, especially since timing and cycles can be tricky! A few of us mums have been confused about this din, and the OB always tells us na the most reliable way is the test or a proper check-up rather than trying to calculate based on dates lang. Fingers crossed for what you're hoping for though, sis!