Could I be pregnant?

So I have been on bc pills for 3 months. I was given previfem and had a 7 day bleed. I was then put on vylibra and only had a 3 day period last month. Lately I have been nauseous throughout the day (even if I didn't drink anything so it's not alcohol related) for like almost a week so far. I've been tired and taking naps when I never take naps. My breasts have been sore for a while as well. I took a test today (5 days before expected period) and it was negative. Just curious if I can still be pregnant and tested too early or if it's just the pills. The other day I was 6 hrs late taking the pill and it was midnight when I took it. I don't take them at same time every day so I'm worried. Me and my bf don't use anything other than the pill for me.