Dealing with someone big

I’ve recently been trying to bottom more; I used to bottom a lot when I was younger and felt better about my body. Now that I’ve lost a lot of weight I’ve felt confident enough to try.

I’ve been able to manage with guys who are around average size, but I recently tried with a guy who was big (8 inches length and very girthy) and it felt really weird. It almost felt like it was suctioning further inside me when he was going in and out. I had to ask him to stop as I couldn’t enjoy it and was worried I might make a mess if it really was suctioning stuff.

Is this a normal feeling when bottoming for bigger guys? Did I maybe just jump up from average to big too quickly?