I had a surgical abortion few months ago. i had my 1st period after like 35 days. for the last 4 periods, my cycle length is too short. is that normal?

Depends : Cycle lengths can be between 21-35 days but should be fairly consistent cycle to cycle. If your average cycle length is 22 days, then it might vary from 21-23 days. Keep track of your cycles from start one menses to start of the next menses. If it is fairly consistent, then this is likely your new normal. If there is large variation or cycles are less than 21 days, then see your ObGyn.