4 month old sleeping habits.

So my 4 month old is definitely going through a sleep regression but I was wondering if anyone else had the same experience or if they had advised. My baby was a great sleeper before this. But she’s only sleeping about 8 hours at night. Naps are basically non existent. I try for 2 or 3 a day. But I spend more time trying to get her down than she does sleeping. Like 45 min to and hour for her to sleep for 20 or 30 min, if she sleeps at all. I feel like she’s not getting enough sleep. Anyone have some advice?