Loosing supply :-(

I have cut down to pumping only 5x a day and my supply is getting low which I need to get back up. I currently have 2 freezer drawers full maybe 60 bags between 100-200ml but I am so scared of it slowly disappearing. I used to be able to do a full days worth of milk and put some in the freezer at the end of the day but now I'm using 2 bags each days without freezing any.
Exclusively pumping is hard work and I am over the moon we have reached 4 months and plan on continuing . It just takes so much time off the day and sometimes feel like giving up.
My current schedule for pumping is,

• when I wake so 8am
• 11am
• 3pm
• 7pm
• 10 pm.

I am going to alter it to,

• 3/4am
• when I wake up.
• 10/11
• 2pm
• 5pm
• 10pm

Im hoping this will help. I know we are coming up to weaning soon I just want to make sure I have enough for when I go back to work in january. I dont mind using frozen for home but when my parent have esmae on the saturday I want to give them fresh as it lasts longer out. 

So my plan is to squeeze one more pumping session in. Even if I can just get closer to 30 oz I will be happy.

Update.
I made it to end boxing day and slowly started decreasing my sessions. I was so happy I made it to 7 months. I would definitely do it again as it was such an achievement :-)