Night reversal

My little darling boy has done it again!!!! Once again, last night, he was up from 11am to nearly 5am this time, not wanting to go back to bed after his feed. This seem to take place every alternate night and last night was the longest ever! His mouth would be searching for the breast as if he's really hungry after 5 minutes of unlatching. He had already fed on both sides and fallen asleep while feeding. CL helped to try pat him to sleep but his eyes were just wide opened. Every time thereafter, he would fall asleep after 5 minutes at the breast. He pooed and we changed him. Not sure if this was keeping him up. Finally, it wasn't till close to 5am that he decided to spare Mommy. Mommy suspected that he was simply treating the breast as a pacifier as it was not like that in the day. Or was it the aircon too cold - 24 deg? Mommy somehow was still perspiring like nobody's business that even the whole bed felt damp. Prayfully, he would recognise day and night soon and get some good sleep at night and not the day. Zonk Mommy...