sorry i am 13 weeks pregnant not 3
If this pregnancy is important to you, you need to address this immediately with you OB/GYN. Xanax is contraindicated in pregnancy and you should stop it as soon as possible. There are other medications that may be safer for you to take, but you must discuss it with your obstetrician. Anxiety disorder needs to be dealt with through therapy and talk counseling, medications for anxiety; especially benzodiazepines are a temporary crutch, not a permanent solution. The underlying issue that is causing your anxiety and panic attacks needs to be found and resolved.
Please DO NOT start taking oxycodones while pregnant. If you get addicted, the baby may be born in withdrawals. So, if you are not already taking them, do not start. If you are, taper the intake slowly, so that both of you (you and the baby) can withdraw together gently and long before your delivery.
It sounds that you have a lot on your plat right now from emotional stand point and it needs to be resolved before the baby comes at least to some degree.
Having children is stressful all by itself and you already have plenty to deal with. Please address ASAP so by the time your precious one comes you can great it with a relaxed smile and focus your energy on taking care of the new bundle of joy.
Good luck to you.