Odd pain!

Ashley
I'm having strange period like pains but not due for 15 more days? Anyone had this? What could it be? Implantation? BD'd last time 2 days ago. Glow said I peaked yesterday (14th) and today I'm on 24%
​Advice needed.
​I don't have any spotting just like a small stabbing paying just above knicker line if that makes sense x