Pregnent, or just random cramps?

hi there i am now 16dpo, on 10-11dpo i had light cramping over night, since then i felt fine since then, untill 2days ago since then i have had slight little cramps on and off maybe 3 a day max, and not painfull just awkward and noticeble. i have also had sore crampy for the past 2 weeks, mainly in one . also my have been constantly hard for the same time which is abnormal... weve been ttc since the beginning of the year, i may just be clutching at straws, not gunna do a test for a few more days as my period changes slightly each month.