Help please...

Alli
I did a test last night (first response pink dye). It had the faintest line, but it was there... I checked the expiry date of the test and it had expired by a month... I did another first response this morning with my FMU but that was a clear negative...
I miscarried this time last year (almost to the day!!) so I'm very very anxious it could be happening again. 
Does anyone have any advice please?
(Sadly don't have any pics of the positive test). 
Thank you in advance x