Normal?

I have had contractions consistently for 2 days in a row. I think they are anyways. They start in my stomach and radiate to my back and I get a lot of pressure in my pelvic area. The cramps feel like I need to use the washroom. Last night I woke up with awful cramps in my stomach happening every 3 ish minutes, was sitting on the toilet and throwing up at the same time and after 2 hours they just stopped. This is my second pregnancy and I never experienced this with my first. Is this a sign labour is coming soon I don’t know how many more of these days I can handle. The cramps are intense but then stop out of no where. I’m 36 + 3, I should also mention I was diagnosed with pneumonia yesterday and just started the antibiotics last night. But I’ve never experienced those types of cramps before in my life. Baby is also measuring in the 25th percentile overall and only the 10th for her head and weighed 5lb 6oz at her 36 week ultrasound. I went 40 +1 with my first and had a membrane sweep to get labour going and had all back labour with her so I really have no idea what front labour feels like. Sorry for such a long post.