HELP🤨🤨🤨

So I been taking a pregnancy test since

3rd of may all negative my period was 6th may I came on my period absolutely fine but the I woke up and realise I was off then it was very light and then nothing again then it came back it was reddish one and that was at the beginning and again not as heavy put it this way I hardly needed to wear a pad

Anyways I never thought anything off it this morning i woke up feeling really sick and my boobs are sore and I'm grumpy anyways I thought what's the harm I taken a test and it came back postive so I tested a clear blue came back postive so I drank more taken another clear blue came back negative i think I may of dilute my urine for it to come back as negative I'm confused has anyone ever period and couple days got a postive