Pee'd the bed?! 😕😬

I'm twenty-four and I can guarantee I haven't peed the bed since I was a kid. But last night I started to pee the bed. I woke up in time to run to the bathroom and finish peeing (although that took some effot) and it was mostly my panties that took the fall, the bed barely got any. But I'm wondering why? It doesn't feel like I have a UTI. I drink tons of water in the day so I'm constantly peeing, last night at work I had a sore lower back but I'm a chef it tends to happen. Plus this month we used preseed for my cycle so I'm wondering if it's a pregnancy sign or what but I'm still ten days until my period. Can anyone help me to shed some light if I should be really concerned or what?