Bladder infection + missed period or pregnant?

I recently was diagnosed with a bladder infection, I am done taking the antibiotic now but my period is late. My husband and I are ttc. I took a pregnancy test on Monday (3 days early) it came back negative. Here I am with no period still. I am such a regular person that this is just bizarre to me. I'm wondering if the bladder infection/medicine could have made me miss my period or if it will be late. Anyone else had this before? I plan to take another pregnancy test next week if I still haven't gotten my period.