BFP at 11dpo?!

My period is due on Wednesday but I’ve been feeling weird cramps and boobs were aching a bit so decided to test early this afternoon (on a 3-hour urine hold). It appeared in under a minute!

Has anyone else had a positive 3 days before a missed period? It’s FRER.

I’m shocked but don’t want to get my hopes up too high incase of things like chemical pregnancy.