I had the exact same experience on the same days and I’m also anemic have been for several years, if your feeling dizzy, tired and you have pale skin etc I would go to your GP who will give you a blood test to see if your anemic, I then had iron tablets and was okay. As for the pills carry on taking them as normal the period should stop but you will be unprotected so for 7 days should take extra caution when having sex (unless you don’t mind getting pregnant)