Latching to sleep

Hi mummies! Am a FTM and new to breastfeeding. My baby is currently 2.5weeks old. Ever since he was born, I've been feeding him on demand, and when he unlatches himself when he sleeps I'll carry him to his cot and he'll sleep on his own. However, yesterday he became very clingy. He cannot fall asleep without latching on to me. He will latch for hours and when I thought he's already fast asleep and I try to unlatch him, he'll scream bloody Mary and demand to be latched. We've tried giving him the Pacifier but it doesn't last long for him and he cannot go to sleep. The only issue I have with him latching is I worry he's over drinking as he did have some milk spit ups. It's been more than six hours since he's had proper sleep and I hope to get some advice on this, mummies. Thank you for listening! #adviceplease #firsttimemom #newmom