Sleep

My LB is 7 months old, he used to sleep for the last 2 months 7pm until around 4 then come in with me until about 6:30. No bottle needed straight to sleep Now he’s going to bed at 7 ish, waking up around 12:30-1ish and not going back to sleep unless he’s in my room then from around 3:30/4 he’s crying with his eyes closed in bed so I’m having to give him a bottle to settle him down? His oz’s have upped throughout the day to around 28/30oz now and he has 2 meals a day? Whats happening? Surely he should be more full so sleep better? I’m shattered because my body’s been used to having all this sleep.