Confused.. help please

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I had stillborn twins on 7/15 at 24 weeks gestation. I was cleared to have sex 2 weeks after delivery. After he checked me he told me I was showing signs of ovulation and told me to expect my period somewhere around the 12th-19th. Never had any bleeding. On 8/23 when I wiped there was a some pink/orange blood when I wiped. 8/24 there was nothing and then again today there’s nothing. The only thing I’m getting is faint positive on pregnancy test (that’s not getting darker) and I’m thinking it may be leftover hormones. Has anyone been through this? Waiting to call my OB tomorrow because they’re closed on weekends to non-emergent situations.