I appreciate your concern and asking on health care magic. Based on your history i would suggest the following:
1. There is need of evaluation to ascertain the details of
anxiety. Has the anxiety started after the start of the mercilon? If yes, it may be a side effect of the drug and the dose you mentioned is 20 milligram or microgram? It is the microgram and i hope you are taking the right dose.
2. If it can be excluded that the anxiety was present before as well and not related to the medicine that you are taking, steps can be taken to reduce the anxiety.
3. You may discuss with your doctor and consider changing mercilon to some other class of
contraceptive pill, for reasons discussed above,if present.
4. For anxiety you need to work on your thinking and find out if there are some particular thoughts or events that are triggering them? Self help cognitive
behavioral therapy (CBT) or professional CBT are particularly helpful for anxiety.
5. You can practice deep breathing exercises to reduce the symptoms of anxiety.
6. Reduce caffeine intake as it promotes anxiety.
7. If self help does not work, seek professional help and there are certain medicines to reduce anxiety as well. I hope you find this helpful.