First, wait to worry. Likely a partial tear at worst, as a full tear would be catastrophic. It will require some rehab but could heal without too much work. After a few days, IF it still hurts, have a Dr. who is a sports specialist look at it. He or she is the only qualified person who can see what's actually wrong here and give you options. The fact is, PTs can only do so much. But I lean toward the evidence based fitness community. Pts can help, but as most studies show, you likely get the most out of the first visit and take that info and work on you own doing the exercises they show you. But, it's your call on that. Physical therapy won't hurt you. But a lot of PTs are full of BS too. But some are very good. Depends on who you get...Adam Meakins is a great PT to follow. He uses evidence and calls out a lot of BS.
A few questions, what warm ups were you doing that caused the injury? I hate to hear the injury happened in the warm up, the very thing that is supposed to help prevent injury.
Here is my advice on warming up. At this point, I almost don't do any warmups that aren't exercise specific. So, for instance, if I have seated hamstring curls, I don't go to the mat and do 15 "mobility" exercises. I literally get on the machine, do a 30 rep max weight (ie something light) and do 10-15 slow, methodical reps and work up from there. Each rep done as if you were doing your target weight. I do this 2-3 more full sets of around 8, 5, and 3 reps on the last warmup set and then do my target weight 1st real set. This is if the exercise is the first one. Usually I only need 1-2 warmup sets for any exercise after that. The key is "warming" the muscle up. Anything else, honestly, is overkill and likely useless unless its a brisk walk on a treadmill or riding a stationary bike or elliptical for about 5 minutes, especially if its cold out side. Now, there are some specific situations where more maybe necessary. So those are on a case by case basis. And sometimes its a good way to get your mindset right, if anything. It can get you dialed in. And don't get me started on the uselessness of foam rolling. The science just doesn't back up any of the claims. But, the one good thing about foam rolling is it warms up the body due to the way you have to hold yourself in different positions while rolling. Otheerwise, pretty mush every study on the potential benefits of foam rolling show is being useless.
