Help! Advice on naps today?

My little girl is 9 months this week. Usually has 2 naps per day, totalling 1.5 hrs. Awake time in the am is about 7-7.30am, bed is 7.30-8pm. Obv varies if we have a bit of a change of schedule or she doesn’t have good sleeps the 2 days she is at nursery. Today however she was up at 7.30- usually due down for a nap at 10.30 but fell asleep when we were out in the car for about 10 mins. Then thought it was party time dispite what we tried when we got home!! I’ve now had her down for technically her first nap (but actually her second) now and she has been sleeping for just over 1.5 hrs. If I wake her now and keep her up- it will be too long a stretch til bed time. However if I try and let her sleep, I’ll also miss the window for a micro nap if she needs it later, meaning bedtime might be super late if she has a Power Nap. Any advice? Should I let her sleep a bit longer and just bring bedtime forward a bit? No idea! First time mum x