27 weeks now

Hi mummies.. I went to doc with a spotting problem at abt 25 weeks.. then given 2 injections (support pregnancy and also to quicken lumgs development. Wen doc again yesterday (26 weeks) and he kept saying he fears a preterm happening...gave another jab to support pregnancy... but i dun have spotting, or low placenta or cervix problem... Im not sure should i worry?? Currently on bed rest, ultragestron, nifelat (prevent contraction) and also seeing him again next week..