pregnancy and Polycystic ovaries!

Hey👋🏻 I'm 21 and have Polycystic ovaries, I found out after my 2nd baby girl that I had them due to periods not coming ect.. Currently been with my new partner for 6 months and we've talked about trying for a baby and have been trying shall I say. I'm a stay at home mum with my eldest who is 4 and my youngest who is 1 and half, and it's hard for me at the minute to currently lose weight which the dr said might help😩 but really struggling at the minute. I normally have a period once every 4 month, which is so bad but recently my last two periods have been on time and lasted the 5 days but really heavy. (Had sex on my fertile days)  My period was due yesterday but it's late I've taken a pregnancy test it is negative,could it be too early? I'm getting period like symptoms and pregnancy ones too but I don't know if it's just me thinking about it too much😩🙈 I just generally feel not well and run down😓