Seem to be having problems..

So I've been on the Mirena iud for almost 7 months now . Always gotten my period on Time. This month period is freaking me out because I started bleeding on Monday then it stopped on Tuesday then came back for abit now it seems to just be gone. im in a lot of stomach pain and seem to still be battling period problems, I've been to the clinic and felt the doctor didn't to know what the hell she was talking about because she had to keep calling another doctor in. Now debating if the hospital is the next move. I hope I'm not the only one whom goes through this because I'm so scared..