please someone listen to my symptoms, I'm so worried!!

Olivia • U.K. Based
I am 15 weeks, everything's been perfect but since yesterday I've been getting sharp pains that last a few seconds in my lower back, vagina and lower belly. I'm really worried as everything has been perfect and I've not exsperienced pain in pregnancy untill now. I've not been bleeding ( touch wood ) or anything but is this a normal part of pregnancy and just means everything is starting to stretch? you guys don't realise how worried I am