Does The Stent Delays My Periods?

I had a urethral stent put in around the 22nd of July and still have it in but I haven t had my period since the 5th of June. I have been prescribed antibiotics but discontinued that about 1 week ago. I am now 15 days late. My husband and I had sex between June 5th and the 18th, right before I was admitted into the hospital but nothing was detected otherwise I m sure I would know. I took a pregnancy test from the dollar store and that came back negative. In February 2014 I had my IUD taken out. Does the stent prevent my period?