Unsure

So my period is all over the place which makes this even more scary. It can last anywhere between 5 days up to a month (Yes I've been to a gynecologist) We had sex on cycle day 9 and the condom ripped but luckily it was just pre-cum, which is still kinda scary. It's been a little over a month now. I am at cycle day 24. I took a pregnancy test today which came up negative but maybe I'm not far enough into it. I am on the pill right now but that week I missed one day so it was kinda inconsistent.