Alas, looks like it was a silly false line as cant see much when taken out of the casing. Stupid me I also took a cheapie alongside it and thought wow it's a decent line but I had used an OPK instead of the HCG. DOh!
May be sign of things progressing though as only had the cramping and brown discharge two days ago. Today I feel exhausted, sick, and dizzy.
Thanks both for taking the time to look x