Thought I was out- still scratching my head

So, I found this board when I first started having symptoms and it helped tremendously... figured I would share my story!
We weren’t supposed to be trying this month, so I didn’t track LH like I normally would so most is estimates.
4dpo: significant increase in thick white CM, noticed it on panties and had to change a couple times during the day- cervix high and soft
5dpo: increases CM continues, cervix low and medium firmness
6dpo: abdominal cramping, very unusual for me mid cycle followed by dull continuous backache. CM continues to be thick “school glue” but, less in abundance
7dpo: backache continues along with bloating, had weird metallic taste in mouth all morning (almost tasted like blood). Cervix is very high, couldn’t assess firmness. Cramping had subsided, had one drink and was drunk!
8dpo: CM is thin and white, less abundance but cervix is wet- faint positive this AM on Dollar tree cheapie!!!
9-13dpo: continue to test, all BFN. Start to think either had a false positive or was a chemical pregnancy. CM continues to be thin and white, cervix stays medium to high and medium to firm. Continue to have bloating, back pain, disturbed sleep, acne (write it off to AF approaching)
14-18dpo: still no AF, continued dull back ache, bloating, sensitive to smell, craving water (I HATE water) call midwife about possible chemical and being late for AF she says to give it a few more days.
19dpo: still no AF, decided this afternoon to take my last test because ya know, why not, just needed something to pee on- BFP on digital!!!!
Still not understanding the positive the. BFNs until 11 days later, but I’ll take it! And will be back to update *babydust to you all*