First of all:
Non contact home use voltage testeers often give false readings - show power when there is no power if there is a power source near the line you are testing.
In the bedroom, when you replaced the switch, you likely did not connect it properly
when you removed some outlets, one or more of them may have been in the circuit(s) that supply the circuits that test - no power.
Hire a reputable electrician to check and correct the work you did,
Read the following:
1/ Look up local contractors first. work out from the closest to your location. If someone you trust has had work done
similar to yours, ask them about the contractor they used. If they were completely satisfied with their
contractor(s), ask for their telephone number.
2/ Select at least 5 your are interested
3/ Do a google/yahoo search on each of the contractors you are interested in; look for praises (check who is writing the praises to see if they have any connection to
the contractor <scam artists and coffident persons often work in groups> google/yahoo search the people giving the praise or references)
4/ When you are satisfied with at least 3 contractors per job, have them give you written estimates with details of work
to be done, terms, guarantee(s), cost of extras (how much do they charge if they find something not covered by the contract), paymant schedules if necessary and
whatever else you can think of to protect yourself.
5/ If the contractor tries to pressure you into signing the contract immediately with a high deposit (more than 15% - deposits over 10% normally are not paid untill material is delivered and left at your site) reject that contractor. Be careful, high pressure can be someone who sounds very convincing, but has
many reasons why you should sign on the dotted line NOW.
6/ It is always good to have another adult with you when a contractor inspects the work to be done.
7/ If you do not get at least 3 written estimates signed by the contractor - not you (do not sign yet) , go back to 1. repeat until you get written estimates signed by the contractor - not you (do not sign yet).
Read the estimates over with some who has some knowledge of the work that has to be done.
This may take longer than you thought; do not rush into it. Research, resaerch research, helps.
When you are ready choose by being informed.
40 plus years certified electrician.