Hoping for something positive!

I'm only 6 DPO but my nipples are super* sensitive! They are also staying hard and the tips are really red to the point my husband even noticed! This happen the last time I got pregnant (we miscarried) but I know this is super early- I did not take an ovulation test this month so I'm going by what my app says. Oh and I've been falling asleep randomly, like sitting up! Any help would be greatly appreciated!