Ay mama, based sa description mo parang mas okay na i-check ng doctor agad para ma-ease out ang worries mo, may mga different things na pwedeng maging bumps sa area na yan, some totally harmless pero better safe than sorry talaga! One of my mum friends din nag-worry about similar thing sa baby niya at turned out okay lang after consultation, pero important talaga na may proper check-up para sure ka. Don't stress too much muna, pero tama na kunin mo ng pedia mo soon lang para peace of mind mo na rin, okay?