Help me

Bethany

I'm scared that I maybe pregnant and had a really bad migraine and taken one lot of ibuprofen yesterday morning around half eleven in the morning and some now at 4 o'clock. I have irregular periods and don't know when to test for pregnancy or if I have missed my period or anything so I'm trying hold off a few weeks but I'm scared I will hurt my body if I'm pregnant and I have taking ibuprofen.