Help with milk supply please!

We recently started om solids and I'm noticing a big dip in my supply. Right now we are only doing solids once a day. She also has an open cup which I offer a small amount of breast milk in for practice (she mostly spills). I offer her solids about an hour after a milk feed in the morning. I EBF and the only other difference is that I started pumping in the morning after her first feed just to have milk to mix her cereal with. And I had been getting anywhere from 1 to 3 ounces. My right breast for a couple days has been lazy. Its no longer full in the mornings and I can't get a let down with my pump. So I started feeding from that side first (usually switch back and forth) and now my left breast is doing the same. She isn't taking in alot if solids. I started on BLW but she would mash the food with her fingers and gag on the chunks then spit. I am still offering a new food item cut into finger length peices for her to try and explore but I also added a iron fortified cereal which she does eat a bit of. Baby sleeps 11hrs straight most nights but will occasionally wake up. The other night she was up 3 times wanting to be nursed. I still nurse at night if needed but she usually sleeps through. I'm drinking tons of water trying to get it back! Do I cut back on the solids?? Or do I add another pumping session. She doesn't take a bottle so anything pumped goes to the freezer and probably won't get used. I also worry that by pumping my breasts will be empty when its time to feed. She eats every 3hrs for the most part during the day.