8 dpo and Constipation

Hi, i am 8dpo today and too nervous to test this early. My nipples started getting sore as of today, but that can be pretty normal for me before AF. For the last couple of days though I have also had major constipation (sorry TMI). This NEVER happens for me. Actually, I have a pretty sensitive stomach so most days I have the exact opposite problem. Just wondering if anyone experienced constipation around 6-8dpo and it ended up being their earliest pregnancy symtpom? Thanks!