No thrusting no pumping, it was just went in for a second then I just pulled out

It looks like her periods are quite regular - between 30 & 32 days. I would therefore expect her May period to arrive 23-25 May.
That would indicate ovulation 9-11 May.

Don't worry about asking again.

With ovulation estimated to be no later than 11th May, she is highly unlikely to have been fertile 17th May

It is therefore extremely likely she will be not get pregnant.

Thank you very much for all you've done. You've helped me stay calm through and helped me reassure my girlfriend. I cannot express how much I appreciate it. Thank you so much. She took the pill this morning although I told her she most likely didn't have to. She just did it as precautionary measures. Anyone I do hope we get through this and next time we won't be as dumb and naive. Once again thank you greatly it's very appreciated. I'll keep you posted.

I'm very pleased to help.
I do understand why she took the EC pill.
The "next time" scenario needs to be considered carefully in advance. A bit like a battle plan! When passion takes over, you don't have time to consider what might be "dumb and naive". The shield has to be in place before the arrow is shot. Clearly define and agree your boundaries in advance. Recognise now how things went, and learn from it.
I look forward to hearing from you in due course, and if either of you think I can help in any way, please ask (privately if necessary).
I sincerely hope you both "get through this"; I think you can.
Take care.