Hi. Before going all drastic and suspecting the worst. Think around simple things first.
Where are the batteries located ? Where is the domestic water tank located ? Is the a hot water tank too ? Where is that ? Is there a generator or any other ancillary objects on the port side in the engine bay ?
Is the galley on the port side ? With its heavy fridge, hob or oven perhaps ? Is the steering hard over to port ? 9/10 times it will be one of the above !