Hi Stacey- I'm no expert- I have one child- a 7 mo old girl! But she has never liked tummy time either. She also often spits up when she is on her belly- sometimmes I wonder if this has to do w/ her fussiness, that it bothers her tummy in some way...
Anyway- things that have worked for us- she will hang out longer on her tummy on our bed- I think because it's softer. We also bought her this great mirror, made by Leap Frog, that is a good tummy time toy- you put her on the ground in front of it and she stares into it (got it at Babies R Us. We just do a little bit at a time and put toys in front of her- she is now sitting up and has yet to roll over (without help)...I'm wondering if she ever will...
I've just resolved to let her develop as she will!!!
good luck!