Help Moving Forward from Diagnoses of T1a

I am really struggling to move on from a T1a Melanoma diagnosis in March of this year. I am sorry if this is long but I just feel like I need to put it out there, somewhere.
Some background: I am a 31 year old mother of 2 boys, aged 1 and 3! I had my second son in May 2019 and pretty much immediately after he was born I noticed a mole on my stomach (that I have always had) was bigger. Naturally, those around me had the explanation that I was just pregnant and that was the reason. I took a picture of it then and I am glad I did. In November of that year I went for my annual skin exam (my college years involved a lot of tanning. unfortunately, shame on me) and showed my dermatologist. She also indicated that it was most likely due to pregnancy skin stretching but to keep an eye on it. Over the winter I just had a feeling this mole was not right. In March of this year I was about to start a new job and knew I would not have insurance for a month, so I took another picture of the mole, and while there was not a huge difference.. the mole had changed. I made an appointment that day and was scheduled for an appointment on a Thursday. The dermatologist took me seriously and said while she was not overly concerned about the mole but if it seemed to be changing she wanted to remove it to be sure. She called me after hours the following Monday and said she was very surprised and she was so glad I came in because it was a very early melanoma. I have always been terrified of getting melanoma and I honestly could not believe I was hearing this. I heard her say .5mm and only a WLE would be needed. I asked to come in ASAP due to my new job. She understood and scheduled me later that week.

I asked for a copy of the pathology report
Diagnosis:
Shave Method, Left Lateral Abdomen- Malignant Melanoma arising in Association with a pre-existing nevus
Histologic Type: Superficial Spreading
Maximum Tumor (Breslow) Thickness: 0.5 mm
Anatomic (Clark)Level: IV
MIotic Rate: 0 per MM squared
Ulceration: Not identified
Tumor Infiltrating Lymphocytes: Present
Tumor Regression: Not Present
Lymphovascular Invasion: Not identified
Neurotropism: Not identified
Tumor Size (Greatest Dimension): Not provided
Regional Lymph Nodes: Not Applicable
Macroscopic Satellite Nodule(s): Not identified
Microsatellite(s): Not identified
Margins: Peripheral Margins Involved
Pathologic Stage Classification: pT1a

After a WLE the pathology report stated:
Diagnosis:
Excision, left lateral abdomen- prior biopsy site related changes, no evidence of residual malignant melanoma

After discussing with my dermatologist and primary care doctor they said regular, frequent skin exams (3-4x per year) are all that is recommended.
Now that it is over with I feel like I have so many questions and cannot handle the “what if”.
Isn’t Clark Level IV a poor prognosis factor? what does Neurotropism: Not identified mean? What if there is a single cell somewhere just waiting to spread?
Will I be around in 10 years for my kids? Do I no longer have the option to have additional children?
I feel like those close to me either have one of two reactions: “why are you so worried they cut it out” or “oh my gosh I would be so worried too”. I am not sure what I want to hear so I just don’t talk about it at all.
Again, sorry if this is long and rambling.. but as I previously indicated. I am struggling.