Naps...she is awake about 1.5hrs in between (only 1hr 15 for first nap and 2-3hrs for bedtime) and was napping for 45mins-1hr...now having 30mins
I've just tried to work out your current timings. It seems to me that you've stretched awake times past what they were (around 90m) and as a result have an over tired baby.
Say baby's day is 6.45am-
6.45 wake
(1h15 awake time)
8.00-8.30am nap
(1h30 awake time)
10.00-10.30am nap
(1h30 awake time)
12.00-12.30pm nap
(1h30 awake time)
2.00-2.30pm nap
(1h30 awake time)
4.00-4.30pm nap
(2-3h awake time)
6.30-7.30 bedtime
I'm counting 5 naps per day being needed there. It's because naps are now shorter.
When you were getting 45m-1h naps then 4 naps per day is reasonable (9.15-10am, 11.30-12.30pm, 2-2.45pm, 4.15-5.15pm, 7.15-8.15 bed).
But now naps are shorter, keep awake time the same (or shorter if needed) and you should end up needing more naps per day.
If you've been trying to keep 4 naps per day, rather than focusing on awake time and having as many naps as needed, you'll end up with a (very) over tired baby who is difficult to get to sleep and finds it difficult to stay asleep.