I thought I tried!

I’m so confused. My period isn’t until 3 more days & I know those TTC are noticing every little thing that happens in our bodies & we think they are pregnancy symptoms but I’m 11 DPO and have already taken tests and they were negative but today I noticed my boobs more tingly and sensitive & also like back cramps (which i haven’t felt before).. so like what could I be pregnant or not 😔