4 days later negtive test was in a bad wrech

I am a. 25 mother of 2 a 7 and soon to be 5 years old, so I been pregnant before but I don't feel any different. I was in a bad wrech in beging of november had 10 broken ribs, my leg is broken in 7 or 8 places n was broke threw my leg in one spot broke wrist and fingers, the girl cross mediam(sp) n jumped and landed on my car right side (where all my. Most injurys are) well had a few surgurys after wrech major like puttin metal in my leg and minor as putting a pen in my hand cause finger was growing sidewards. Well me and my husand has had sex but protected cause I was taken off BC cause of blood flow. I am.4 days late now but took 2 test both negtive good cause I got a lot of healing still ahead but wht else could it be gettin worried