I had my break about 3 weeks ago and i went to pharmacy to get a restock but I was given the wrong pill . I went back to change it but they said I needed a new prescription, so I had to take those pills as I was waiting to see a doctor for a new prescription, so I took about 5 of them and then started my normal pills straight away the day I got them. My boyfriend usually finishes inside as I use my pill correctly and very very rarely ever miss a pill. We’ve had sex the past 2/3 weeks but I didn’t allow him to finish inside as that would be silly. However I’ve woken up this morning and I’m bleeding. I don’t know why. I’m still taking my pills as normal. Is this just a side effect of switching pills or something else?