Sharp twinges/pains in lower abdomen

Carrie • M/C 12/2016 • TFMR 12/2017 • M/C 7/2018 Baby girl born 12/27/19 Baby boy due 12/19/21
Anyone ever experience this?  They don't feel like ovulation pain or regular period cramps at all.  I had an HSG a week ago today (CD 4), and the next day the doctor said I was about to ovulate based on my bloodwork (this is the second cycle after I've taken clomid where this happens--I ovulate on like CDs 6-7 of my cycle).  Thoughts?