Heavy cramping

Valerie
Hello, so I've been experiencing pretty bad cramps since i walked home from work Saturday. (1.2 mile walk home, & im a server in a resturaunt). Tylenol occasionally helps but sometimes it doesnt. I emailed my doctor and asked what should I do, but shes only in her office Thursday & Friday only which sucks!! There is NO BLEEDING however the pain gets so bad it has me keeled over, unable to walk or stand straight up. Sometimes when I lift my left leg high to go around my bed, it hurts badly too ( the cramping is only on the left side, its the left hip / lower abdomenal area). However, after a long nights rest it still hurts but not as bad as it gets like when im up and active. Someone please help!! I am worried, im 15 weeks preggo today. Im not sure if i pulled something, if im too active or what it is. Please help!