LOL.....sorry I shouldn't laugh.....indded it was a smile as i read your post.
\\\\If, God forbid, this were another ectopic, would I be feeling this pain early on? \\\
At best NoM, if you had had intercourse, you could only be a few days pregnant, but, of course, if you hand'r had intercourse, you couldn't be pregnant..............no an ectopic at this stage is a non starter.
\\\\Should I go to GP and get bloods for HCG and have then repeated 48 hours later? \\\\
No I cannot see how they would help at this stage, for the reasons given above.
\\\\\And could a Doctor sanction a prophylactic dose of Methotrexate? \\\
A doctor could sanction anything, but it would have to be for the benefit of the patient with minimal or no side effects. This is a non starter.
//Please tell me this is just normal....//
This is just normal.