Does TTC mess with your cycles?

Brittni • Happily married since (2013), one baby girl (2019) and #2 on the way ❤️🤞

We’ve been TTC for a little over two months now. Not very long. But the first month my cycle was way off. Spotting a week before AF and AF was even a little longer than normal. This month I’ve had off and on lower back pain, similar to like I normally would right before AF previously. Just wondering if anyone else experienced out of the ordinary thins when they started TTC...