My GF has missed her periods for this month. She was expecting it to be on 29th-31st January 2021. But still she didn't get her periods. We had protected sex on 22nd of December 2020 and also ejaculated away From her body. She had periods on 31st December 2020 which lasted around 3 days and she says that the bleeding was like normal period. After that we didn't have sex till date. She joined a new job in bank where she is getting more mental stress. 1st we thought it is due to the stress but now we are afraid. Is there any chance of pregnancy. If yes how many weeks now. What to do next?. Please help.