Strain muscle from hiking

On Sunday my boyfriend & I went swimming and to get to our spot we have to hike & climb big rocks, well he has no issue climbing these rocks because he’s tall & I have a hard time doing so because my legs are short & im pretty sure I strained my thigh muscle. It didn’t hurt as bad when I got home on Sunday from hiking but the past 2 days it’s been hurting so bad to the point where I’m limping & not being able to walk down the stairs