Lying awake absolutely terrified. Woke up about 40 mins ago and started getting pain very low in abdomen. At first it was leading to passing wind and I was like ok intense trapped wind. Then the pain got worse and worse. I don’t think I’ve ever felt anything like it. Stopped passing wind and just started to feel sick. I got really hot and queasy. Went to the toilet and was sick a bit. Pain eased. I went for a wee and wiped, no blood but bit of colour in discharge. Lying in bed now and pain starting to come back. I’m 5 weeks and 2 days so I’m so frightened I’m losing it

I’m so scared.
I'm really sorry you're going through this.
Do you still have that shoulder pain? You should go to A&E if so. Perhaps you should go anyway, given the combination of symptoms.
Look at your local hospital midwifery/maternity pages - there should be an emergency number to talk to a midwife, tell them you had the issue before. If not, 111 should be able to contact them to call you back too.
Not all pain or bleeding means miscarriage but you need to speak to someone. Even if they tell you to watch and wait.
If you really, really don't think it could be ectopic, tomorrow, first thing, call the midwife or the doctor and ask for/how to get a a referral to the 'early pregnancy unit', explain everything including the shoulder thing. They should scan you. If you think there's any chance though, go in, it can affect future fertility.