Why is my calf muscle still sore after 3 1/2 weeks?

Typically, I do a variety of activities, and am regularly physically active. I did a leg / butt workout a few weeks ago, had usual soreness, but mostly in the deep muscles of my right buttock with mild soreness in my calf on the same side. After a week or so, my butt got better, but the calf didn't. I did a swim and a walk - toward the end, I felt the calf slightly pull or cramp, so I took a couple days off. When I worked out 3 days later, the entire leg felt tight, and I thought I strained / pulled it, so reluctantly took a couple weeks off and treated it as such. It does feel like it might have been torn, and there are small lumps I can feel along the gastroc muscle fiber, but it doesn't really hurt a lot or feel much weaker and the soreness / tenderness doesn't seem to be going away. I don't want to risk tearing it more bc I can't afford insurance right now, but don't want to miss working out it it's not necessary.