No Period... But No Positive

Over a month ago, I got my Kyleena removed as my fiancé and I decided to TTC. Since then, I have not had a full period... but multiple negative pregnancy tests later, I’m left with no answers. Before Kyleena my period was fairly regular. I spoke with a nurse about it, and she said it could take up to 6 months for my hormones to balance out after the IUD. Still, I drink occasionally and my parents just got a really fancy hot tub! I’m slightly paranoid that if I just brush this off as hormonal imbalance, and I am actually pregnant, I could end up potentially harming the baby. Anyone have any advice? Part of me wants to say that there’s nothing to worry about, but when it comes to literally creating life I feel that I can’t be too careful! Thoughts?