Hi,
Please help me sleep

. My 4 month old boy (he was 6 weeks preterm) wakes up during the night 4 to 6 times. He is not hungry, and a little sh/pat plus the pacifier puts him back to sleep. He eats EBM (I gave up breastfeeding him some time ago), I pump and give him the bottle. This way my husband helps with the feedings.
Our daily routine is:
7:00 up for the day
7.15 E
7:30 A
8:00 S
9:30 wakes up, A
10:15 E
10:30 A
11:15 S
12:00 wakes up, A
13:45 E
14:00 S
16:00 wakes up, A
17:00 E
17:15 A
18:00 S
18:45 A
19:15 Bath
19:25 E
19:45 S
22:15 DF
After this, he usually wakes up at 00:30, I give him the pacifier and he goes back to sleep. I tried "wake to sleep" around 00:10 but it did not work, he still woke up after that.
Again, he wakes up at 1:30, same thing. At 2:30 I feed him (he does not take much, we are planning to drop this feed soon). He sleeps until 4:30, wakes up, same pacifier + sh/pat. Again he wakes up at 5:30, 6:00 and 6:30.
This has been going on for at least two month. He slept through the night only a few times. Lately, he seems to want to suck his fingers and because he is swaddled he gets frustrated. I find him sometimes sucking his thumb through the blanket.
Please give me an advice... I need my sleep too....
Monica