Who is pulling on my limbs pre-projection

I think your on the right track,
May I ask, at what time of the day do you attempt to project? ( Night, Morning Evening? )

In the morning actually. It almost always happens when I've been awake a while then lay back down and meditate - so, to answer my original question, do you think it's an entity on the astral plane pulling me out or is it just that my limbs can separate easier?

Thanks for your response :D

Actually thinking that your limbs can separate easier, Maybe you cant separate fully because your still thinking to much about your pshysical body?
I'm no expert at all haha but ignore the buzzing and sensations is what matters. And when you are feeling for yourself that you are ready to leave your body,
Try a exit technique... And practice it over and over..  ;)

When I usually hear the buzzing I know I'm close and try and will myself up and out - either through the window or forcing my whole body upwards like I'm lighter. It's still tricky, I feel like my abdomen area is pinned down whilst the rest is up and away! I've started to do more base chakra meditations in case it's something related to that.

This happens to me too! I feel as though someone or something is pulling part of me up and out of my body, but my chest/waist are staying put. I find that I need to sort of roll on to my side (not physically) and roll out of my body. Does that make sense?

Hi April,
You can roll out, but sometimes when you try to roll out, you may end up rolling your physical body and ending your vibration :)
So, Its safe to use Movement free Exit methods to get out of body :)
You can get it here: http://www.forumforastral.com/techniques-and-help-to-astral-projection/astral-projection-exit-method/

Regards,
Praveen