Ok I’m super confused

So last month I had a light period and suspected I was pregnant so tested and got a few faint bfps on frers up until o day then they turned to stark white negatives. I put it down to a chemical and again this month I had an even lighter period with no cramping, so am cd12 today anyway I tested on Saturday and got a faint line again and have tested a few more times since with other brands all showing faint lines BUT they do not progress and I’ve started getting ewcm today so I’m pretty sure I will o in 5/6 days time. So my question is has anyone else got faint bfps up until o? Is it possible for me to have slightly raised hcg in the first half of my cycle but not be pregnant? Thanks ladies xx