hi all im new here!!

just needed a little bit of advice. i had my mirena out 18th November, 2 days after removal i had a heavy 5 day bleed. since then i have had nothing, which makes it 40 days. i took a test on 24th and there was a faint positive but it was really faint my partner can see it as well though! im gonna take another test tomorrow but has anyone fallen pregnant this fast after mirena removal?