33 weeks and I'm scared :(

I'm usually not one to get worked up about things but this pregnancy has been especially trying on me. At 23 weeks I had to be given a shot to stop contractions and it's been test after test after test...a constant roller coaster. This is my 3rd baby and the only one I've had any complications with. He's measuring 5 weeks ahead but I'm sure of my due date. I'm 33+4 and have felt awful the last few days. I kept having horribly painful contractions but they were sporadic and pretty far apart. On Saturday I felt nauseated and had no appetite and I've been that way ever since. Today I started having more regular contractions. I contacted my doctor and she told me not to come into the hospital unless they are every 5  min or less for at least an hour. Well, they've been about every 6-7 minutes all day. I have so much pressure down there. He's visibly dropped but he's still breech! Tmi but I'm also having awful diarrhea despite barely eating.  I have this horrible feeling like I'm going to have a major anxiety attack any second. They scheduled me for a checkup for tomorrow morning and said they'd do a stress test and check my cervix and if I'm dilating they'll give me a steroid to help his lungs develop. I just can't help but think that this baby might come too soon and I'm terrified about his lungs not being developed and that he won't be able to nurse...plus I'm thinking if he's still breech I might have to have a c section and that's just not something I want 😢 I'm just really scared and needed to get it off my chest..