Hi Kelly,
You're still very early, so it's hard to differentiate from surgical causes (stretching, etc of the muscles), or other causes that are more long term, but which do abate and eventually go.
For surgically produced, there is the overall trauma that you underwent. The muscles take time to get back, so it's actually pretty impressive that we are back and functional as quickly as we are.
I remember a hamstring pull that I rewarded myself with when kicking a heavy bag one time. It took a good three months before the muscle loosened enough to let me back to life, so despite the stress of the surgery, I think the surgeons try to minimize the damage done.
So from surgery, you get the overall trauma, scar tissue that needs to be dealt with (I had some pulls from that until it loosened), swelling and its aftermath, the weakness as the muscles recover - and the uneven way in which they do.
Longer term, there are issues that can pop up. The IT band on the outside of the thigh is a muscle that can be an issue for us. It is a common issue for runners and other athletes as well.
Like Chuck mentioned, the roller is a great tool to fight that, but that can only be done at a later time, when you are stronger and more able to move your body. For now light massage on the non-incision area is probably good.
After the incision was blessed, my PT people also did light massage of the incision to break up any incipient scar tissue.
Overall, we have short term challenges and longer term. I still use my roller, for the IT band, lower back, upper back and hamstrings. It is grueling for the first few weeks, since we are so tight, but when used frequently, it is very good at helping us.
I started to use it at four months.
So what you're feeling is normal. Patience is key, you are still early on.