Ugh! Nipples 😩

I've been worried about this since the beginning.. I have extremely sensitive nipples and just touching them lightly is super arousing for me. I asked this before on here, when do nipples stop feeling this way and everyone said its completely different once bubs is born and there's nothing sexual about it. I KNOW there's nothing sexual about breast feeding! but I literally can't stop my body from reacting to nipple stimulation 😩 I'm 38 1/2 weeks and have tried nipple stimulation and light pumping to encourage labour and literally cannot do it for more than 30 seconds it's they're way too sensitive and its still arousing. I don't understand how this just switches off once baby is born and I'm terrified to nurse and get those feelings. Can someone please explain their experience so I understand how it changes? thanks