Unrelenting tension headache

Nina • 29, TTC baby #1, madly in love
For those that have BTDT, do you recall having a really bad (tension) headache lasting for more than one day?  
​I usually don't get them and if I do, they go away quickly. I woke up this morning and it's still here.
​Also, I feel crampy.  I am 8 DPO.