I totally understand your concerns about this new finding.
the following points should be taken into consideration :
1- these bruises that happened to be present on both sides indicate that the bleeding under the skin is due to the pressure of your body, but the fact that this is bilateral makes this finding interesting and requiring investigation to rule out any coagulation disorder.
2- coagulation disorders can be acquired or congenital. Even if you did not have previously any excessive bleeding from your
gingiva when brushing your teeth or at simple trauma to the skin, or heavy menses if you are a female, these disorders can be acquired and thus you must be evaluated with the following steps
A- a
complete blood count CBC must be done in order to detect the level of platelet, because a
thrombocytopenia ( a low level of platelets ) can be a possible cause.
B-
bleeding time must be done in the lab to detect any platelet dysfucntion, which will be elevated in case of a low
platelet count or a normal count but non functional platelets.
C- PT/PTT must be done to detect any problem with the coagulation factors.
Best Regards