Positive pregnancy test ?

Last Thursday, 13dpo I took a pregnancy test and it came out positive. Very very faint but clearly visible. I took two more test after that same day and they were negative.. I went in that day for a blood test and my results came back <3.50 hcg. Witch means negative l…

I’m wondering am I to early for a blood test? I also took two digitalis, popped open the test to check out the test strip and that also have faint lines..

I’m currently 18dpo and haven’t tested since, I’m nervous to test! I’m also 3 days late on my period