Advice

So I took a hpt 4 days after missed period that was positive. Been testing every day since and have had positives that got darker. I started bleeding brown almost like a period no cramps or pain. Doctor did ultrasound but couldn’t see anything due to it possibly being to early. Did a blood draw beta was at 36 only so I went back and did my second one Monday and I’m still waiting on results 🤧 My hpt are still coming out blazing positive so is it safe to say I’m pregnant or could it have been a chemical ? I’m so confused and wondering if anyone has been thru something similar…