Help!

Ella
So yesterday I went to the ER because I've been having my left armpit swollen for 2 weeks having also tons of fatigue.  But yesterday in the middle of an event I started having terrible pain on my entire arm and neck. In the ER they did some testing but they were not sure. The thing is that my HCG showed 5,9. I did my third round of clomid and on Monday 25th cd19 they told me that it didn't work and to take provera and start birth control ( I still haven't) 
I'm not sure what does that 5.9 means. Or is it normal? I'm on my cd 23
Thank you! 
Ps: in the ER they didn't say anything and I didn't notice till I read myself the results today.