Help please

My babe is 7.5 months old now, he was EBF for the first 5 months, then I went back to work and started pumping when at work. I pump 3 times, 9am, 12pm and 3pm. And then nurse whenever I’m home. I used Lansinoh pump and would get 5-6 oz the first time and 4-4.5 the other two pumps.

We went away for holidays for 2 weeks and I left my pump at MIL’s home. I had another one, Spectra, at home so I started pumping using that one. Right off the bat, I was getting 3-3.5 oz. Two days in, now I’m barely getting 1-1.5 oz TOTAL. Is it the pump? Or is it cause once we came back from the holidays we started feeding babe twice a day instead of once (breakfast and dinner)

Help please 😩