Could I pregnant?

Would you have symptoms at 24 dpo?..

I'm not 24dpo I'm on cycle day 12. (I think) I say think but a few people said I wasn't on my period it was implantation but it got heavier to I marked it down as a period...

Anyway for the last id say a week I've been feeling sick at different points through that day and twice actually been sick a little, the thought of some foods are making me feel sick and even the smell is too 🤢 I tested at 12&13 dpo and got negatives so I haven't tested since. I only tested to sort my boyfriends head😂

Any advice please? Is it in my head?