Hey ladies. Some help please! X

I’m 20 and I stopped taking my pill at the end of December around the 23rd as it was giving me the worst mood swings, and had my withdrawal bleed around the 1-3rd. I haven’t yet had a period and me and my partner have been having unprotected sex nearly every day. I have pregnancy symptoms like nausea and headaches and my boobs are sooo tender and my nippes are a bit tingly. I have done 3 pregnancy tests during the month and 2 came back positive but I did one today and it was negative? But I haven’t had a bleed so I’m a bit worried. I was always missing pills and forgetting to take them so could I have got pregnant sooner and my withdrawal bleed could have been my implantation bleed? Thank you x