14wks pregnant and excedrin

Help! I recently got pretty sick and i took 4 aspirins these last couple days (not all four at the same time. 2 one day and 2 the next) 
After that wasn't helping my migraine I bought extra strength Excedrin and I take 2 in the morning and 2 in the middle
Of the day everyday. I just read that it could harm the baby and possible kill it. Is that true? 
I'm 14 weeks and lately have noticed my stomach hasn't changed at all from before I was pregnant and I feel no movements.