Af has arrived this month with a vengence and I am sore (I swear labour is easier than this)

Pre baby I took Ponstan (Mefenamic Acid) which I would really like to take again. Does anyone know if I can take it while BF'ing? Jackson is only fed twice a day (Am and PM), so would it matter?
I've taken Ibuprofen already this morning to no avail. Is there anything else I can take?