You've been back 2 months, they should be fine... Have you scared them or handled them roughly recently? Have you been spending time with them, at least 2 hours every day? Are they possibly sick? Has anything changed other than you leaving? Food, temp, family, smells, cage location?
Any of these can be reasons they aren't acting normal.
How old are they? If they are going through puberty, that could be the cause. Has your appearance changed at all? I agree, going back to square one might be your best bet. Also, if you can spend time with them separately that might help. I hope you will recover quickly!
They stayed at home in the same room. my husband fed them. . 1 of the birds picked him. What a shame because he does not spend a lot a time with them. Oh well I started to play instrmental music and they love it.
My birds are 9 momths old and the mom is 2 years. My energy is lower, but I talk the same to them feed them and give them fresh water. They still land on my head and my shoulders, but won't let me give them scratches. At least they love the easy listening music I play for them.