Puking and peeing constantly

So I'm not pregnant... I'm on CD15 waiting for my LH to surge. I've been on letrozole 5mg and estrace 5mg and baby aspirin. I'm done with everything except the baby aspirin. Went for my ultrasound yesterday and I have a 16.9mm follicle so we're waiting til tomorrow to recheck and do the trigger shot and inseminate. This morning I woke up and brushing my teeth made me puke (didn't gag myself I don't think so), my stomach is a mess, and I've peed 5 times since 7:30am (it's 12:10pm now). I don't think this is OHSS because I only have one follicle or does that not matter? Could I just be sick? Ugh. This cycle has been a little rough with side effects