I’m gonna be ok , right ?

Looking for a bit of support here. I’m running Rome marathon March 22 . My training is not where I needed to be but I’ve been running last 10years mostly half marathon distance (I’ve run like 20) . Today I set out for 18miles which I thought would put me where I needed to be so I dont hurt myself running next month. I ran Rockaway beach To Long brachial on a boardwalk that was a giant puddle . Mile 12 I started feeling stomach issues and spit up a bit . By mile 16 I had spit up like 3 more times and my socks were soaking wet I gave up on the run and took an uber home. I had no physical pain but It was the right choice but now I’m wondering if it will be ok to do my 18mile next week and then a 10 mile the week before . I’m gonna be ok right ? Did I just f myself by it finishing the 18 today ?