What's going on... BFP then AF arrived :(

Hi everyone, this is my first post and I could really do with some advice/support as I haven't told any of my friends what's happened. My partner and I have been TTC for a while. I've had 2 BFPs so far, the first ended at 6 weeks and the second one was this week. I got a faint positive 4 days before my period was due. Then it arrived today and I have really bad cramps to the point where I am doubled over in pain and feel sick & dizzy. I always get diarrhoea on the first day as well. We're now going to stop trying for 4 months as we have booked a big holiday but is this too much of a gamble? I'm 31 and I worry that time is running out for me.

Has anyone else had 2 early losses like this? Do you think it's ok to take a break from TTC for a while? Thanks x