19 days late 52 day cycle

Hi ladies, so my boyfriend and I decided to try to have sex (again) I chickened out like he already had the condom on and his tip was almost in there but we stopped because I was scared. He never ejaculated inside of me or had any precum. I haven’t seen Aunt Flow since last month (March 3-7) and I’m really scared. This happened too like back in August and January I believe. I took about 5 pregnancy test and they all came out negative. There is no chance of being pregnant in my situation right? I feel like I’m just stressing about this entire situation. I’m not TTC at all..I’m super scared guys ): my usual cueles are 35...