I Am A User Of Xarelto... Three Days Ago, The

I am a user of Xarelto... Three days ago, the end of my right thumb started hurting, then developed a blood blister. The blister keeps growing in size. I've been to two hosipitals and no ne can give me a clear anwser to
the problem. I wanted to lance it and they said no. Should I stop taking the drug? what can you tell me? I've been on this drug for over a year.