My bf just tore her calf muscle this past weekend, while dancing at an office party.
She's in tons of pain too, but she said she's starting physio in a couple of days. In the meantime, she's wearing compression stockings, has pain medication, is using crutches and keeping weight of it (all doc's orders).
I'd say definitely go to the doctor.. it's a serious thing!
PS my friend says it's HORRENDOUS pain!