What Causes Red Bumps All Over The Body?

hi i dont know how this work im just getting more worried as days go by cause something new always comes up but ok when i was 2 months pregnant i started getting little red dots all over my legs i had my son 6 months ago and there still here just worse now i have them from my shoulders down i have gained at least 50 lbs and im always sleepy and lately for the past 3 months ive started going to the restroom like 3-6 times a day just to poop im so sore and so tired with dots everywhere please help