By now you should have completed recruiting questionnaires for each school (Ivy and other HA) where you have interest. You will find links on the school websites.
Then send a video of your pitching with a radar gun in view. (Others with pitching son's can chime in here). With each video contain something about you in the subject of the email. (Position/Graduation year and something that will grab them). For my son it was his 60 time and GPA (which yours is high too)
Events where the HA's gather (Headfirst/Showball) are good, but it is nice if you are on their clipboard as a player to follow (given previous correspondence).
I'll piggyback on Fenway South's Bullet point #1--communication. I used to remind my son to send the school's a note when something new (test score, game highlight, academic award) came up.
To give you an idea of how some Ivy's make their decisions- there are usually 7-8 spots per year. My son's RC/HC where he landed I think saw him play 7 times between showcase events, American Legion games and HS games. His RC told my son that he was at events, that son didn't even know RC or college were present.
Also having the test scores (SAT/ACT) in the forefront is good, as you clear the first hurdle of HA schools. You should have copies of an official transcript from your guidance counselor handy.
As for the timeline, you are a little behind if you haven't reached out to the schools yet for Ivies. They are going over the list of candidates on their "board" based on need. Fortunately pitching is always needed and is usually half of each recruiting class.
Make sure you have a backup plan and have touched based with other HA (D3 tend to make their decisions after the Ivy League. Son kept in contact with 3-5 of D3 schools before he received his Ivy offer. Has your HS, Travel, Legion coach every had another player land in the Ivy League--does he have contacts with any? Those contacts were beneficial to son whose Legion coach had played baseball on a team with the RC of one school and had traveled to many showcases (Legion mgr was working at a college at time) with another.
Good luck, and LOUSYLEFTY's advice to seek past threads is a good one. A plan is definitely needed. Time to get to work with set goals with dates.
Given that you went to 2 HF camps (many schools in attendance). Did you receive any feedback? For a RHP if would say you probably need to "Sit" where you maxed, in terms of MPH.