37 weeks and not sure what is happening 😩

I’m a first time mum and I’m 37 weeks since last night ive been feeling sick and having baddd heartburn . Through the night I was roasting I even had the fan on and window open. Come 3 am wake up but can’t sleep I just felt really uncomfortable 😣. Then I couldnt get out of bed due to severe lightening crotch 😭 took 20 minutes every time I moved it hurt . Then I had diohrea this morning 😭😭 . Now I’m still having on off lightening Crotch ( irregular) with some back ache 😭 could this be the start of something 😭. I just don’t know what to do ???? Thanks in advance x