Confused/concerned

Lei
Hello ladies, this will probably be a long one, but;
According to Glow I am 7 weeks pregnant exactly, but in the last day or two I haven't felt as pregnant as I did when I first found out that I was? The nausea has kind of laid off now, apart from last night where I woke up in the middle of the night feeling like I was going to be sick! My backpain has been pretty much non existent for the last 3 or 4 days now. 
Though since 3 days ago (Saturday) I have been experiencing harsher cramps on my lower belly? On the right hand side where my uterus is, they haven't been constant, just coming and going, almost felt like a stitch you get whilst walking! 
I'm still urinating frequently and I do get the excessive thirst as well, and always feeling very sleepy. 
I'm just a bit concerned about the change of some symptoms? And the cramps getting stronger! Can anyone tell me if this is normal?? I'm scared :(
I am seeing my Doctor tomorrow, hopefully that wil clear things up.