Just need to vent, hear some advice and encouragements

I'm 25 week and have been having contractions since 22 weeks. I'm on procardia and progesterone. For the most part, its been better. But past 2 days I have had nausea. Well last night, I started having mild contractions along with cramping, sharp pains and back pain and pressure. In a span of 10hrs I took 3 of my procardia (supposed to only take every 6hrs unless not working, but have never had to take that many in that time). It helped the contractions for an hour or 2 right after taking it, but they just come back. They are not close together or anything. I'm miserable at this point. I threw up this morning so I'm sore from that, I feel like I'm on the worst period of my life and I'm just ready to give up. I sent my SO to get me some Tylenol and so I took some and I'm hoping it helps. I have a heating pad wrapped in a blanket and am laying on it for my back. I don't know how I'm gonna make it through my 3rd trimester. Anybody else had a hard time through pregnancy? Please nothing rude. I'm super emotional right now