DD2 is 5 months.
We've been a bit lax about contraception. I'm exclusively breastfeeding - no dummies, no expressing. However she's a good sleeper and these days generally wakes once for a feed, or not at all. Cluster feeds all evening, sometimes up to midnight.
No periods yet.
I didn't get periods until DD1 was 18m, but she was waking for feeding more often.
Need I take a pregnancy test? Not sure how big the risk is really.