I've had quite sore boobs, extremely bad back pain, been really sleepy all the time

Hey, just wondering if anyone could help me with some of the 'symptoms' I'm having, for just under a week I've been feeling a bit dodgy I've also had quite sore boobs, extremely bad back pain, been really sleepy all the time and eating like a monster. I had my last period on the 29th April lasted the usual 5-7 days. I had unprotected sex before I came on and near on everyday since I came off so it would be really early to tell if I was pregnant, I'm just so confused on what's going on with my body and I'd appreciate the help so much!