12 DPO and cramps what does this mean? Test is negative?

Hi Everyone, I am 12dpo and didn’t track my ovulation this month. I have PCOS but cycles are regular for the last 2 months.

I have these symptoms since 4 days not sure what they mean-

1. Left Lower abdomen cramp when I do any activity or sit with legs folded for longer.

2. Constant lower back pain

3. Sore breasts

4. Felt dizzy for just a sec today after activity

I usually take prenatal vitamins, metformin and Inositol but I didn’t take any this month at all.

My progesterone is usually on the lower side.

Also I took my easy @ home pregnancy check today- it is negative with just one dark line.

What are these symptoms, can anyone help me.