I need your input!

So the first two pictures is the first test I took, and people have said they see a plus sign.. I see it too but the line that's going down to create the plus sign is very faint. I took two other pregnancy tests I think 2 or 3 days after I took the first one and they are completely negative. I'm confused to why the first one I took looks positive and the other two are negative. My period is currently 7 days late, and I've been exhausted, and my boobs feel tender and I've been having discharge everytime I pee. Also I've been peeing like every hour and I've never done that before lol. Just comment and tell me what you think is going on, because I have no clue!😏

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