Spotting ?

Vanessa • Thu, Feb 28

So started my loloestrin in January and had no spotting or anything that month only in my period now this month I started another pack and I am two weeks in on my blue pills and I am spotting today why ? I was on an antibiotic like 3 days ago and I was taking mucinex could that effect it. Could this be a sign of pregnancy or is it just spotting