Do you think the medication is working well to control her reflux? If she's in pain, there's not much point working to get her on to a routine because she won't sleep well if she's uncomfortable.
She is still sooooo young but as a guide you would be feeding every 2.5-3 hrs, and awake for only about an hour, so a rough routine might be something like
7am: feed, burp, change nappy
7.40am: start wind-down: swaddle, close curtains, start shush-pat
8am: asleep
9.30am: feed, burp, awake time
10.30am: start wind-down as above
10.45am: asleep
12.30pm: feed
1.45pm: asleep
3.30pm: feed
4.45pm: asleep
5.30pm: feed
6.30pm: asleep
7.30pm: cluster feed
8.30pm: asleep
9.30pm: cluster feed
10pm asleep for the night