HELP

i don't even know what to writei had a mc back in march and i found this website which was a godsend but now i'm afriad im having another one and don't know what to do. my mc last time the baby was not planned wanted dearly but not planned and for about a week i've been thinking im pregnant again but we havn't been trying and i've been on the pill, but i can't shake the feeling that i am pregnant but tonight i started spotting and the ONLY other time i've ever had that happen was when i had my mc. also i'm having horriable stomach cramps and sharp pains in my lower back all things ihad last time. I'm afraid i'm just panicking over nothing but it took me months last time to get over the mc and am still not really over it, you never get over it. if i am pregant and losing the baby i'm not more than 4 weeks along i had my period last week and it was perfectly normal thats why the spotting is scarying me. my husband is in the military and in the field for the rest of the week unreachable and so thats why i'm turning to you all. WHAT DO I DO?? would it show up on a pregnancy test if i am, since i'd only be a few weeks and what if i was but i'm losing it would it show up then?? i'm scared and angry that this is happening again, this is my worst fear. HELP please i have no one else to turn to.....