Please someone help me!

I just found out Sept 23 that I was pregnant. I took 5 hpt since then and all positive. However, on the 25th I started with light pink spotting, I randomly had some more on the 26th and now it's become closer to red. I'm very very scared. Last year at this same time I had a mc so I'm scared it's happening again. I have no cramps. Well I had them last week when my period was suppose to come but as far as with the spotting I haven't got cramps. My back has been hurting but I'm also in real estate school and I'm sitting for 8 hours twice a week. Someone please help me. I want this baby with all my heart.