Braxton Hicks??

34 weeks pregnant, second pregnancy. I never really felt the contractions with my first because they induced me at 39 weeks due to GD and I slept throughout my 12 hr labor, also had an epidural so I only ever felt the ring of fire, lol. My back is killing me, I feel like I have to poop 24/7(sometimes getting a sharp pain at my tail bone,) my hips are killing me in a sense that they just feel tired, and now I'm feeling a tightening in my lower stomach. Could this just be baby dropping, as he's been sitting extremely high this entire time ? Or is this Braxton Hicks? Orrr, am I about to go into labor? I'm a bit worried as I had a hard time getting into an OB for over 3 months, only just had my first appointment since February 16th at 4 months. I also tried to pleasure myself earlier and even touching my clit made my lower back feel like it was being stabbed. Also wondering if sleeping on my right side could be causing this, my hips have been having a really bad time and sleeping on my right is the only way I can move in the morning. What are we thinking ? I have an appointment on Wednesday, but my baby shower is happening on Sunday. Could stress be affecting this? I have no idea WAT my body doin, what this baby doin, help pls.