Chance of Pregnancy

Ok so I got my IUD removed on December 4th and then I had a normal period on the 6th-12th. I assume that was my body returning back to its normal cycle so followed my predicted fertile window which was between the 16th-24th. My boyfriend and I had sex basically throughout all of it, sometimes with a condom sometimes with him pulling out. One day he forgot to pull out so we went and got a Plan B. I took it but we had sex again not too long after that and I decided it was time for me to get back on birth control because obviously we couldn’t handle it. I started the pill a week ago on the 23rd and now I’m not sure what’s happing because I’ve been experiencing all of these symptoms including, milky discharge, tender breast, fatigue, bloating, headaches, mood swings, etc. Unfortunately all of these are symptoms of pregnancy, Plan B, and starting BC. So I’m just curious as to how likely it’s sounding that it’s actually pregnancy and not side effects from the other two?