Please can someone offer advice and support...

After two mc’s we decided to wait to try again as I had a promotion and we had holidays booked and we wanted to relax. Accidentally had unprotected sex this morning (I used to be on the pill and I just forgot). According to app I’m 4days pre ovulation. Do you think there’s a chance this month? I got pregnant straight away with first two. We go on holiday in less than two weeks with friends and I don’t know how to feel. It’s a festival we’re going to do pretty obvious if I don’t drink but I can’t bate to have one just in case I’m not as I don’t want to do ANYTHING that could cause mc again. Not sure I could forgive myself. Also I’m not really upset and scared because it might happen to us again and I hadn’t mentally prepared myself. Sorry this is so long. Any advice or support really great fully received. X