pregnant??? not pregnant????

Liz
I still haven't had my period and I can't remember the last time I had one I've already taken 2 at home tests which both say negative and I even when to the clinic and they said it was a negative WHAT THE HELL IS WRONG WITH ME THEN???  I'm freaking out!!! It's not that I don't want another baby I just think it's to soon! I have a 5 month old and I'm a first time mom I don't know if I could handle them being so close in age I pretty much do everything by myself my SO has 2 kids before me and they are so rude and disrespectful and he barely helps me at all with our daughter! Help!!