pink spotting

hi everyone last Sunday I had a big bleed. was in the hospital. baby was all good heart beat 160. then on Friday I began spotting light pink blood again and I'm so paranoid. My Doppler sucks and I can't find babies heart beat. I've found it atleast one time but not sure if any of the other times I've thought I found it if it was it. I can go get checked tomorrow possibly but I hate to waste the hospitals time. can anyone reassure me please ... My back hurts like around my love handles and I have a bad headache. I'm 13 weeks 3 days