2nd relapse in 6 months

Hi. I was diagnosed with rrms in October last year but had tests for 3 years. I had relapse sept/october/november last year and now I’m having another. I was on tecdifera in December but it made me ill. Started AUBAGIO 6 weeks ago. I thought you had a longer time between relapses. Has this happened to anyone else? Started steroids today last time I had them my pulse went really slow. Hoping it doesn’t happen again.