Yes, I had a lot of scar tissue and very limited mobility. Part of your limited mobility is due to the swelling and because of that you may have to wait a few more weeks until it goes down before you can begin physical therapy. But, I think PT is really important after bunion surgery. If I hadn't gone to physical therapy I would still have limited mobility in my foot. My therapist taught me various ways to massage the scar tissue away and exercises to rebuild the atrophied muscles in my legs. He also used ultrasound to get rid of deep scar tissue. Now I have full range of motion and no mobility issues whatsoever. My podiatrist also tended to not be very communicative with me so make sure you speak up and ask for a physical therapy prescription (I think you have to get a prescription from your Doc in order for your insurance to cover the cost). I don't know how far along you are in the healing process but you can probably start massaging your foot on your own (with cocoa butter) to help with the scars and scar tissue. The more you do it the better because after about 1-2 years, the scar tissue that is still there is permanent!
Don't get stressed out by the issues you're having now, it's totally normal and the recovery process for bunion surgery is never really as short as they say it will be. But, it will go by fast and you'll be back to normal in no time