How to avoid miscarriage before 1st trimester in over?

4 weeks in my pregnancy and I am very worried and scared to miscarriage. I have been doing at my body tells me. Eating when needed, sleeping when tired. I have had intercourse 3 times.. I have been spotting everytime after. It terrifies me so I asked my boyfriend not to have intercourse. I don't want to lose this baby. What have you guys done to avoid miscarriage? Comments are appreciated.

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