Cramping over a week before AF...

RR • Together since 2009 | Married since 2014 | 3 M/C`s | MTHFR | Rainbow baby born 07/02/17💗 #2 Due 12/21/20!!
So I mistakenly took an ovulation test thinking it was a pregnancy test (yes I know, not the brightest bulb). But I've noticed lots of cramping over the last few days and as of today AF isn't due for another 5-9 days (<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Period tracker</a> says 9 but glow says 5). 
Has anyone else ever had cramps this early before AF or before a BFP