Accidentally rinsed off spray tan early

So I’ve been getting spray tans for probably 3 years now and got one today but decided I’d try the rapid which I’ve never done. I set a timer on my phone for 4 hours and another timer for 5 in case I wanted to leave it on a little longer. I decided I didn’t want to leave it on for 5 because I didn’t want the tan to be splotchy.

However I didn’t realize when I washed it off I was looking at the wrong timer and it had only been 3 hours and 20 minutes. I’m so mad at myself I already see it’s not as dark and usual and my event starts on Friday through Sunday so I’m assuming it going to come off even quicker then had I left it on the full time. Plus I’m going to be sweating a lot.

I use the PBT black ice tanning lotion which I put on right after I got out of the shower but my question is, is there anything I can do to build the tan in time? Should I apply the lotion twice a day and shower as little as possible (I know that’s gross) is the tan still going to darken over the next 12 hours like it normally would had I left it on? Are there any other products anyone recommends that can help? I’m so mad at myself I honestly want to cry.