33 weeks and miserable

Ill be 33 weeks on Wednesday with our first baby and im absolutely miserable now. Im starting to feel a lot of pressure, especially when i walk and my muscles feel sore now, kinda down there, having a hard time breathing, im hurting all over the place now. My question is, are there anything that show im close to labor or it might be happening within the next few weeks? Having pressure is a new one and the cramps have returned.